Profiling persons reported missing from hospitals versus mental health facilities

Missing person reports from hospitals and mental health facilities are a significant issue impacting patients, communities, and health and police sectors. Research on missing persons seldom considers the type of location from where people go missing, which can be troublesome due to the increased chances for experiencing harm during an episode from hospitals and mental health facilities. When location type is studied, these often remarkably different places are frequently blended together in analyses and discussions. This conflation has implications for research and the development of effective police preventive responses. To begin to address this gap, this study uses descriptive analysis and logistic regression to examine the descriptive and predictive profiles of those reported missing from hospitals versus those reported missing from mental health units. For this, data are taken from a sample of 916 closed missing person cases reported to a Canadian municipal police service over five years. Results suggest there are significant differences in both the descriptive and predictive profiles of individuals reported missing from these two location types, such as individuals with varying mental health and cognitive issues going missing from each place, respectively. Given the findings, the implications for research, policing, and risk management are discussed.

Such focus is vital to developing strategies to reduce and prevent missing incidents, as well as because of a duty of care, safeguarding, and risk of harm (Hayden and Shalev-Greene, 2018). The current evidence base, therefore, mostly addresses people going missing from these locations through a lens that fails to account for all parties involved in handling missing person cases. Without empirical attention, police responses and case handling practices are constrained to anecdotal or otherwise internally shared working knowledge that has not been tested and/or found to be effective.
Another issue is that the current literature on missing events from health settings has, at times, blended location types together in analyses and discussions under the catchall categories of "institutional locations" or "hospitals," or has omitted location type as a factor for consideration altogether. Consequently, the issue of missing person reports from hospitals or mental health facilities is not depicted as a distinct issue affecting policing, but instead is viewed as a general problem related to institutional locations. Yet, medical literature shows that hospitals when compared with mental health settings have appreciable differences in their environments, facilities, and security and staff available (Cabarkapa et al., 2020), which may be more or less conducive to individuals going missing. Because of this lack of distinction, police response efforts are unable to prioritize according to the factors associated with missing person cases from each place. Thus, there is a need to extend the current body of literature on the impact of place type on the profile of missing persons. Altogether, the array of issues and research gaps fashions a ubiquitous issue for police that warrants attention.

Literature review
It has been well-documented that the variety of definitions for "missing person" adds unnecessary confusion and complexity to these cases (Taylor et al., 2019). For instance, the terms 'absent without leave,' 'unauthorized leave,' 'absconding,' 'absconder,' and 'escape/escapees' are used to explain this phenomenon, particularly in clinical research (Taylor et al., 2019). These phrases can be retained under the term 'missing person' because they represent the same police report creation. The Royal Canadian Mounted Police (RCMP) (2015: 16) conceptualization is used in this study, namely that: "Anyone reported to or by police as someone whose whereabouts are unknown, whatever the circumstances of the disappearance. Missing person cases are complex because many factors contribute to these incidents, which can place demands on police and police resources. For example, there are numerous antecedents to someone going missing, such as marital breakdown, financial difficulties, suicidal ideation, and mental disabilities, among others (Biehal et al., 2003;Stevenson et al., 2013;Taylor et al., 2019). These various precursors to missing events can make it difficult for police to triage each case and effectively focus their response efforts. In relation to missing persons from hospitals and mental health units in particular, much of the literature has found that patients who go missing are often those with diagnosed or undiagnosed mental health issues (i.e., schizophrenia) (Muir-Cochrane et al., 2010), cognitive and physical disabilities, and drug/alcohol dependencies . Thus, police are often searching for and returning individuals that are in a variety of states and differing capacities. Concerning the reasons for missing episodes, those who are reported missing from health settings are cited as doing so because of boredom, a lack of privacy, fear of other patients, feelings of confinement, isolation, a lack of meaningful activities, confusion and misunderstandings, and many more reasons (Emanuel et al., 2017). This means that there is not one or a few specific "triggers" influencing missingness from these locations, nor is there always a clear antecedent, compelling police response to be acutely case-by-case. All in all, several mechanisms influence and contribute to missing episodes. Responding unfailingly to such varying and complex cases, combined with the reduced human and financial resources, is a challenge for police.
Missing person cases from health settings can also produce high social, economic, and emotional costs that have far-reaching implications for many sectors, communities, and families and friends (Muir-Cochrane et al., 2010). Focusing on policing implications, research from the UK and Australia highlight that, specific to hospitals and mental health settings, police are implicated in returning over one-third of persons missing from hospitals (Bartholomew et al., 2009;Bowers et al., 1998;Dickens and Campbell, 2001;Meehan et al., 1999;Muir-Cochrane and Mosel, 2008;Wilkie et al., 2014). In Canada, recent research advances that around 12% of all missing person cases reported to the police are initiated by hospitals and mental health units . The volume of cases originating from such locations accrues an estimated cost for policing in the UK of around £879,060 per year (Hayden and Shalev- Greene, 2018;Shalev Greene and Pakes, 2013), which is over $1,500,000 CAD. On top of this, existing studies state that multiple missing reports are considerably more likely to occur from hospitals and mental health units than from other locations (Hayden and Shalev-Greene, 2018;Shalev Greene and Pakes, 2013). This adds further resource pressures because police can be called to retrieve the same individuals on numerous occasions, who are then regarded as vulnerable because of their repeated high-risk behavior (Shalev Greene and Pakes, 2013).
Other potential implications for police, aside from resources and costs, are that they can face severe adverse publicity and criticism if they have issues locating or fail to find missing people, especially persons regarded as vulnerable (e.g., children/youth) or high profile (Swanton and Wilson, 1989;Taylor et al., 2019). Families of the missing from these locations have been documented as viewing police responses as insensitive, dismissive, and lacking urgency. When issues with missing person cases occur (i.e., unresolved, negative perceptions), police, as well as health services, can suffer from a loss of public confidence, reputational damage, harmful media exposure, and legal liability (Bowers et al., 1999;Clark, 2012;Muir-Cochrane et al., 2011, 2013Parr and Stevenson, 2013).
Given the above issues, Hayden and Shalev-Greene (2018) report that research has determined that police consensus on their role in missing person reports from hospitals and mental health facilities is that the police should not be relied upon to act as a "24-hour social service." Recent research from the UK notes that clinical and psychological domains should be heavily involved in the resolution of these cases and should have more resources available proceeding a missing episode as they are optimal for advancing interventions (Taylor et al., 2019). Thus, both clinical researchers and police convey some consensus in that these events ought to be handled more so by health services. Still, police are, typically, the go-to service for these events, especially for emergency and urgent responses and those at high risk for suicide and harm to others (Emanuel et al., 2017). To note, in some specific situations and jurisdictions in Canada, an "Order for Return" is initiated to engage police assistance in retrieving a missing patient under the Mental Health Act (Emanuel et al., 2017), whereby the person may be under a specific treatment order, and so locating the individual becomes a matter for the police (CAMH, 2019). Regardless, these cases represent a "mission creep" in which major cuts to public services, welfare services, and charities result in more calls to police and police doing much of the heavy lifting, rendering them a 24-hour response service to missing person calls from hospitals and mental health facilities (Garside, 2015;Hayden and Shalev-Greene, 2018;Millie, 2013).
Turning to police responses to missing person cases more generally, each police service across Canada operates within a context that requires different approaches and responses due to a variety of elements, such as community and jurisdictional size and geographic locale (Pfeifer, 2006). Thus, there are no standardized police practices across Canada for these cases, given that instituting a restricted set of responses for all services would ignore the individual challenges encountered by each agency. To handle each report on an individual basis, police searches and investigations are often distributed into several in-themoment produced tasks to be completed and reported on (Shalev Greene and Pakes, 2013). Before responding to these cases, however, one relatively consistent police practice across Canada is the use of a risk assessment form. This involves a series of questions that identify the nature and urgency of the missing person case based on several "risk factors" that have been established by either the province/ territory or the police service itself. Hence, the included factors for assessing risk can vary from service to service and largely depend, again, on internal knowledge. Some of the factors outlined within risk assessment forms in Canada are, in no particular order: (1) age (e.g., very young), (2) weather and other physical conditions (e.g., terrain), (3) physical and mental capacity (e.g., Alzheimer's), (4) the circumstances surrounding the disappearance (e.g., dangerous), and/or (5) mental illness or suicidality (British Columbia, 2018;Government of Ontario, 2018).
Outcomes of these cases vary, with most people being located within 24 hours (Canada's Missing, 2019) and few experiencing harm (National Crime Agency [NCA], 2019). Although there is a strong link between missingness and severe injury to others and self from hospitals and mental health units. For example, Australian researchers report that there is a suicide rate of 20% for absconders, of whom most use violent methods (e.g., drowning, hanging) (Shah and Gansvaran, 2000). Investigators have also found that, specific to these places, other harm and adverse events with a high likelihood of occurring are alcohol consumption, overdose death, self-neglect, aggression, violence, sexual assault, and medication non-compliance (Bowers et al., 2003;Carr, 2006;Dickens and Campbell, 2001;Pages et al., 1998;Tammelleo, 1999). For missing person reports from other locations, however, harm befalls anywhere from zero around six per cent of cases (NCA, 2019;Huey, Ferguson, & Kowalski, 2020).
The challenge then is for police to assess risk across missing person reports by prioritizing cases through a triaged response approach and risk assessment framework (Pfeifer, 2006), especially from hospitals and mental health units due to the potential for harm. This tactic can involve a resource dilemma for police because failing to utilize the appropriate resources may result in serious injury to the missing person, but deploying unnecessary and ineffective resources is a drain on frontline policing and can increase vulnerability in other vital policing areas. Research on developing a risk assessment framework based on evidence-informed risk profiles or contributing factors could greatly benefit police, decrease negative implications, attenuate resource demands, and reduce missing incidents. Accordingly, this study focuses on these two location types that are regarded as particularly problematic and challenging, given the associated high risk for harm and police resource strains generated. Such focus from a policing perspective can assist in providing an actuarial approach to initiatives aimed at reducing the volume of missing person cases from hospitals and mental health facilities.

The current study
Identifying the profile of missing individuals and the conditions surrounding missing incidents from these locations would assist police in risk management efforts. Risk management is a vital tool often used in clinical domains to safeguard the welfare of the patient and community (Muir-Cochrane et al., 2011). To apply this to policing, risk management is a means to prioritize and triage police response, as well as search for and locate the missing more efficiently. Risk assessment is one such tool that assists with these goals. Additionally, as identified by the CAMH, looking at predictive indicators can provide insights for better collaboration between the police and health sectors. One way to examine indicators for risk assessment and management purposes is by profiling missing person cases. This involves revealing distinguishing features between the types of missing people, as well as the reasons behind the episodes, and offers predictions for who and what types of cases are more likely to go missing (Foy, 2006). Therefore, the purpose of this article is to uncover the descriptive and predictive profiles of the missing from hospitals versus mental health facilities to assist with informing police risk assessment and fill in knowledge gaps.

Data
To examine the phenomenon of going missing from hospitals versus mental health facilities, data were extracted by a crime analyst from the record management system (RMS) of a Canadian municipal police service. These data were stored and managed per the standards instituted by the Canadian Tri-Council Agencies and the author's university research ethics board, from which approval was received to carry out this research. Files obtained consisted of all closed missing person reports generated over a five-year period (2014 to 2018), which included a total of 8519 cases. From this, a separate data set was created containing only those individual records who were reported missing from either hospitals or mental health facilities, which was noted under "Location Type" in the files. This reduced the sample to a total of 2173. Then, any reports were excluded if it could not be clarified (i.e., from the qualitative data in the "Remarks" or "Synopsis" sections) whether the person went missing from a hospital or a portion of the hospital that is regarded as a mental health setting. For example, "missing from 7th floor" and "msng -psych floor" were coded by the police service as "hospital," yet these comments represent psychiatric wards. The reason for this exclusion was to ensure that there was no overlap between the location types. Such distinctions are important in this study because the purpose is to examine differences in the profile of those who goes missing from each place comparatively. This elimination process resulted in a reduced sample of 1051 closed missing cases that contained sufficiently detailed information for the analysis reported here. Lastly, because of a relatively small number of cases having missing data, listwise deletion was used on the included variables, whereby incidents were removed if there were any missing values. This process led to a final sample of 916 individual missing person files from these location types during the study period.

Variables
The "Location Type" variable is used here to examine the profile of who goes missing from hospitals versus mental health facilities, which stems from the RMS-generated category and qualitative data sections. These places are coded as either hospital or mental health facility. Given that data quality is of concern when researching with police data (Canter and Allison, 2003;Duncan, 2020), the coding was verified by cross-referencing the address of each case with the hospital and mental health facility addresses within the city in which this police service is situated. Of note, all hospital and mental health facility addresses located in this municipality were referenced throughout these data, indicating that the sample is representative of this city. As a final accuracy check, police officers working on the search and rescue (SAR) team from this service also reviewed and verified the addresses and coding. This final process did not result in any exclusions or adjustments as there were no disagreements regarding the coding.
For missing person characteristics, the following demographic predictors were included: race/ethnicity, age group, and sex/gender. For health information, any documented health-related concerns, issues, or statements throughout the "Remarks" and "Synopsis" segments of the data files were coded, as well as any pre-existing, RMS-generated variables. Lastly, for incident characteristics, probable cause, history of going missing, and the assigned urgency level were coded.
Concerning the demographic characteristics, the missing person's police-identified race/ethnicity was coded as white, Indigenous, Black, Asian, and other. This latter group was created by collapsing the categories of Middle Eastern, East Indian, and other into one variable due to low cell counts. A dummy variable for sex/gender was created, where 0 ¼ male and 1 ¼ female. One limitation of these data is that a person's exact age is not mentioned consistently throughout the files, so this is not known for each missing individual. Instead, their age was reported as a range. For adults (aged 22 and above), the age groups were coded as they were categorized within the RMS data: 22-29 years, 30-49 years, 50-65 years, and over 65 years. However, for youth, adjustments were made to the RMSgenerated groupings. The seven original categories (0-3 years, 4-5 years, 6-8 years, 9-11 years, 12-13 years, 14-15 years, and 16-17 years) were collapsed into one: 0-17 years. This occurred because there were very few missing reports within this age range, so including the pre-existing categories left too small of a sample size to provide stable and/or reliable results. The remaining included age group is 18-21 years.
Health information was coded according to the following RMS-generated classifications: drug/alcohol dependency, medical dependency, mental disability/senile, mental illness/possibly suicidal, and other/none known. Any qualitative data available under the 'free text' section of the files were also coded according to these categories (if they were not coded already), such as "is a known drug abuser" being coded as drug/alcohol dependency or "kidney disease -reliant on meds" as medical dependency. The "other" RMS category was collapsed into "none known" to create one grouping because there were no data files that included information on what "other" entails. Given that it is unclear what "other" represents, merging these two categories is necessary to ensure there are no ambiguities in what these cases include or exemplify.
Lastly, incident characteristics are the types of cases in this data set and involve the categories generated within the RMS. These contain probable cause explanations, which are the reasons police noted as why the person was reported missing: runaway, wandered off/lost, and other (i.e., "missed curfew"). History comprised no previous history, repeat, and habitual/chronic, which was assigned to the individual by the police service based on their knowledge of each case and access to any other occurrence reports. For context, "repeat" missing person cases are commonly files with one to three previous missing reports, whereas "habitual/chronic" reports are those that have a substantial number of prior missing episodes (i.e., more than three) and so are the biggest drivers of police missing person service calls 1 . Finally, urgency level involves the following policeassigned groups: non-emergency, urgent, and emergency. These categories are loosely assigned based upon police risk assessment, and are hierarchized and steer police response efforts. "Emergency" cases represent the highest risk 2 and so demand the greatest amount of attention and police resources, "urgent" files represent a moderate level of risk and so generate a fair amount of attention and police resources, and, lastly, "non-emergency" reports often call for the least police resources.

Models
Logistic regression is used to analyze the profile of missing persons from hospitals in comparison with mental health facilities. The use of this model was selected because, given that the dependent variable in the analysis is binary (Location Type), the use of a linear probability model violates standard OLS assumptions. For a missing person i, the full model estimating the profile of missing persons from hospitals versus mental health units is: where x 0 i represents the set missing person characteristics (i.e., demographics), z 0 i signifies the set of incident variables (i.e., case characteristics), and " i captures residual variation. Below, the logit model provides estimates on the whole sample with hospital as the base category. This allows for direct comparisons between the two location types for the profiling of missing persons. Table 1 presents a descriptive overview of the included covariates. Beginning with the explanatory variable, the number of reports from hospitals versus mental health facilities is roughly equal, with hospitals producing marginally more reports from 2014 to 2018 (n ¼ 464; 50.4%). Turning to the demographic variables, those identified as white constitute the most significant number of reports across the years (n ¼ 720; 78.6%), with 55.6% of reports including this group originating from hospitals. The closest represented group to white is Indigenous, who comprise 9.7% of the total sample. Many cases are noted as male (n ¼ 568; 64.0%), for whom both hospitals and mental health facilities initiated an almost equal number of reports. Lastly, those between the ages of 30 and 49 years comprise a significant majority (n ¼ 378; 41.3%) of these reports from both hospitals (n ¼ 164; 43.4%) and mental health units (n ¼ 214; 56.6%). The next largest age category is 22-29 years (n ¼ 297; 32.4%), which accounts for 53.2% (n ¼ 158) of the cases generated from hospitals and 46.8% (n ¼ 139) from mental health facilities.

Descriptive profile
Regarding the health covariates, those reported as having a mental disability and/or as senile, such as severe schizophrenia or dementia, account for a majority of cases from mental health facilities (n ¼ 230; 56.7%), whereas those noted as possibly suicidal or mentally ill, such as depression or bipolar disorder, comprise most cases from hospitals (n ¼ 188; 64.8%). Generally, those with a mental disability and/or senility account for more missing person reports than any other documented health characteristic (n ¼ 406; 44.3%). This could be explained by the growing aging population in Canada, resulting in several adults with cognitive impairments , or might represent a high number of people with mental disorders at such settings.
Lastly, for incident covariates, "runaway" is cited as the reason a person went missing substantially more than any other probable causes (n ¼ 590; 64.4%). Specifically, 54.2% (n ¼ 320) of cases from hospitals and 45.8% (n ¼ 270) from mental health facilities involve runaways. This finding is notable because those classified as running away are documented in the existing literature as voluntarily going missing and often impulsively decide to leave (Biehal et al., 2003;Payne, 1995;Taylor et al., 2019). However, it is not clear from these data whether the missing episodes are the result of intentionality, accident, disorientation, or rebellion, among other potential reasons. Turning to the number of cases across the total sample, most individuals were reported as repeatedly going missing (n ¼ 337; 36.8%); however, differences can be seen across location types. Those who go missing from hospitals often have no history of doing so (n ¼ 179; 68.6%), whereas those classified as habitual/chronic account for most of the reports from mental health facilities (n ¼ 200; 62.9%). This shows that those who go missing from hospitals generally do so only once, but cases from mental health facilities go missing several times.
Overall, as shown in Figure 1, the descriptive profile of those reported missing from hospitals involves those who are white, male, aged 30-49 years, with a mental illness and/or possibly suicidal, runaways, either repeat missing persons or no history of "going missing," and nonemergencies. For mental health facilities, the profile is somewhat similar, where the common cases are white, male, aged 30-49 years, runaways, and non-emergencies, but instead have a mental disability or senility and are habitual/chronic. These profiles are explored further below. Table 2 displays the estimates of the logit model predicting the profile of missing persons from mental health facilities with hospital as the base category.

Predictive profile
Noticeably, the findings reveal distinctive profiles of missing person cases from hospitals relative to mental health facilities. The predictive profile of missing individuals from mental health facilities when compared with hospitals is significantly more likely to be male, older, and those noted as Indigenous, Black, or other race/ethnicity. To expand on this, female gender emerged marginally significant, wherein females are 0.939 times less likely to go missing from mental health facilities relative to hospitals. The older an individual, the higher the odds that they will go missing from mental health facilities in comparison with Concerning health information, every documented health concern significantly increased the odds of an individual going missing from a mental health setting compared with hospitals. For example, those reported as drug/alcohol dependent emerged as almost three times more likely to go missing from mental health facilities. The other health covariates also emerged as significant and positively associated with mental health facilities, whereby those noted under mental disability/senile (2.171 times or 117.1%) and mental illness/possibly suicidal (1.203 times or 20.3%) are more likely to go missing from mental health facilities when compared with hospitals.
Lastly, for case characteristics, repeat and habitual/ chronic cases are more likely to go missing from mental health facilities. Notably, those reports classified by police at the highest level of risk (urgent) are significantly less likely to occur from mental health settings instead of hospitals. Cases from mental health facilities are not significantly more likely to be classified as anything other than non-emergency. Also, files from mental health facilities are almost four times more likely to be habitual/chronic (3.880 times) and are over two times more likely to be repeat (2.318 times). Thus, the predictive profile for mental health facilities is that of non-emergency cases that involve people who have been reported as missing at least once in the past. This finding may represent that those who go missing several times are perceived to represent less of an emergency (by the responding officers, not risk assessment) than those who go missing for the first time, as the first missing report is regarded as an out-of-character behavior.
Synthesizing the above, Figure 2 offers a graphic display of predictive profile for missing presons from mental health settings. As shown, Indigenous, Black, other race/ethnicity groups, older adults, those with a previous history of going missing, drug/alcohol dependencies, mental disability/senility, and mental illness/possibly suicidal embody the predictive profile of missing persons from mental health facilities when compared with hospitals. By contrast, this means that the predictive profile from hospitals when compared with mental health facilities is white, female, and those who have the capacity to run away from the situation or environment. Thus, different profiles of people and cases go missing from each location type. This highlights that without isolating hospitals from mental health settings in analyses and discussions, results may not be indicative of the reality of missing persons cases, which can misinform police procedures and practices and affect the quality and applicability of research.

Discussion
This study investigated the common profile of people reported missing from hospitals versus mental health  facilities, as well as examined the missing person and case characteristics associated with each incident to generate predictive profiles of missing persons. Based on the findings, it can be said that profiling has potential in policing because distinctive descriptive and predictive profiles emerged based on the type of place, which has implications for police procedures and practices, as well as for future research. Risk management approaches should consider the indicators found to be associated with missing person cases from each location type, which could be trialed to reduce the incidence of missingness, and, ultimately, attenuate police resource demands. Altogether, the insights provided have the potential to help police direct their efforts toward areas that require discriminating, pertinent, and instructive strategies, such as missing reports from these location types with increased likelihood of harm. Although the findings offer an initial understanding of missing person cases from these locations in Canada, several key contributions are provided that extend the existing literature.
First, there are distinguished descriptive and predictive profiles of missing person cases from each location type. This finding suggests that managing and assessing risk under the categories of "institutional location" or "hospital" does not suffice. The importance of police isolating these places within their data gathering is evident throughout this study, given that it can be crucial to calculations of risk. For example, police officers, when fulfilling a risk assessment form for a missing person case from a "hospital," could gather additional data on whether the individual is a hospital patient or a patient in a mental health setting. This would prepare a better-informed risk assessment that assists in determining an appropriate level of police response, as well as directing such responses (i.e., targeted deployment of resources) (Biehal et al., 2003;Bonny et al., 2016). Previous research examining locations and missing people have stated similarly, but have also questioned the extent to which the place one goes missing from can be weighted, given that there is a lack of research on this matter (Hayden and Goodship, 2015). Nonetheless, this study delivers strong support for approaching risk assessment differently in ways that could induce efficient responses to missing person reports from these locations and improve the use of police resources. Overall, examining location types is a fruitful avenue for further exploration as risk is shown to differ depending on the place from which one is reported missing.
The next contribution is the common profiles of those reported missing from hospitals compared with mental health facilities in Canada. For hospitals, the profile consists of middle-aged, white males, who have some mental illness and/or are possibly suicidal. These cases are also typically runaways, repeat or first-timers, and nonemergencies. Whereas for mental health settings, the profile is also that of middle-aged, white males, who are reported as running away and non-emergency cases, but instead are living with a mental disability or senility and are habitual/chronic. The demographic profile of cases from these locations is mostly consistent with the extant body of literature in that men when compared with women (Bowers et al., 1999(Bowers et al., , 2000Farragher et al., 1996;Meehan et al., 1999;Quinsey et al., 1997), and white persons when compared with other race/ethnicity groups (Brook et al., 1999;Hayden and Shalev-Greene, 2018) are responsible for more missing events from these locations. Although future research would benefit from expanding the Standard errors are given in parentheses below parameter estimates. The base category is "Hospital" as the location. y p < .10; *p <.05; **p <.01; *** p <.001. Weighted estimates by 95% confidence intervals.
examined data to explore race/ethnicity and missingness in a Canadian context, given that many recent reviews and reports highlight that Indigenous peoples, specifically women and girls, are especially at-risk for going missing and experiencing harm during these episodes (Cohen et al., 2008(Cohen et al., , 2009). Interestingly, older adults constituted the descriptive profile of the missing from both place types, which contrasts with existing scholarship indicating that young individuals mostly go missing from these places (Bowers et al., 1998(Bowers et al., , 2003Meehan et al., 1999;Muir-Cochrane et al., 2010). However, specific to this finding, researchers explain that this may be more to do with patient admittance leading to an overrepresentation of young individuals in patient profiles (Meehan et al., 1999;Muir-Cochrane et al., 2010). In this study, the profile of missing persons from each location consists mostly of middle-aged individuals. Explanations for this finding are not available from this study; however, this may similarly indicate that older adults are the typical profile of persons admitted to hospitals and mental health facilities instead of the pattern of missing persons from these locations. Future research on patient admittance compared with missing patient profiles in Canada would be useful for providing clarity on this variation.
The common profiles of health concerns and case characteristics from each place type reveal some interesting distinctions. The most striking difference was in the history of missingness from hospitals versus mental health facilities, whereby cases from hospitals typically have no previous history of going missing. Yet, for mental health facilities, individuals commonly go missing multiple times as they are mostly habitual/chronic cases. This represents a reason for concern in the duty of care and protection practices of mental health facilities and a significant issue for police due to resource implications and missing persons increased chances of exposure to harm (Hayden and Shalev-Greene, 2018;Muir-Cochrane et al., 2010). Explicitly, risks are particularly critical when people go repeatedly missing (Hayden and Shalev-Greene, 2018). The high incidence of multiple missing persons cases from mental health facilities is a sign that there may be something wrong with where they are or the situation they are in, or institutional issues are contributing to these incidents (i.e., security, staff, institutional abuse, etc.) (Hayden and Goodship, 2015;Rees and Lees, 2005). This finding is further notable because of the most significant probable cause explanation being running away. These patterns are mirrored across the literature on missing events from these places, and many researchers have called for further investigation into why many patients go missing repeatedly and run away from mental health settings (Hayden and Goodship, 2015;Hayden and Shalev-Greene, 2018;Muir-Cochrane et al., 2010;Rees and Lees, 2005).
Turning to health concerns, the common profile of missing persons highlights that most patients missing from mental health settings have mental disabilities and/or senility, followed by mental illnesses, and are possibly suicidal. For hospitals, most missing person cases have mental illnesses or are suicidal, followed by mental disability or senility. Taken together, reports from hospitals and mental health facilities can be particularly challenging given the variety of capacities and states people may be in when police are searching for and locating them, compounded with the high incidence of repeat missing reports and running away as reasoning for the episodes. These findings strongly emphasize the need for research on how to lessen these occurrences, generate evidence-informed risk assessment, and foster collaboration between police and health sectors for each location type independently.
Lastly, this study offers predictive profiles of who goes missing from each location and the subsequent risk for exposure to harm, as well as the case circumstances. These predictive profiles markedly show that different people and cases are more at risk of harm and are more likely to go missing from each place. The strongest message from these findings is threefold. First, there are more factors associated with risk of harm and a higher likelihood of missingness from mental health facilities when compared with hospitals. This highlights that missing person cases from mental health facilities require a particular focus from both police and health sectors, especially in terms of establishing risk assessment and knowledge sharing, to reduce episodes and lessen the resources attributed to these cases. That is, efforts are required to strengthen police and mental health facility partnerships, joint risk assessments, the revision of procedures and protocols, and the sharing of knowledge and support. Second, most of these high-risk factors involved healthrelated issues, which calls into question whether the health services may be better positioned to handle these cases than police (i.e., trained, knowledgeable staff).
Lastly, there are several patient-specific and settingspecific differences in the predictive profiles, which could serve as choice points for interventions to reduce the incidence of missing person reports from these locations. These variables represent areas in which police could target more resources, such as front-loading resources, when a missing person call arrives involving any factors established as increasing risk from each place. Directing resources to high-risk cases would moderate issues with balancing police resources without creating vulnerabilities for policing in other areas, as this is a strategic allocation effort. That is, these predictive profiles provide indicators that can be targeted in police decision-making, responses, and procedures. Altogether, the findings concede that patterns within missing persons data can be pinpointed and that, by including data on location types in police risk management efforts, the generation of precise categorization and predictive criteria to attenuate police demands for these cases is highly probable (Foy, 2006).
What do these findings mean for police? First, research on persons reported missing from hospitals and mental health facilities, specifically from a policing perspective for assessing possible risk, is one such area that should be focused upon for the future development of police procedures and practices. Given that this study is a first look into distinctions between these cases, extending the objective base would serve to guide police practices with empirical research, instead of anecdotal or internally shared working knowledge. Therefore, this study is one step towards developing more robust methods for classifying possible risk from these places because it offers an actuarial approach that can inform strategies in the missing persons and policing arena (Foy, 2006;Kiernan and Henderson, 2002).
Second, risk assessment based on predictive variables from each location type can help advise the search and investigation process, determine the resources allocated, and manage each case (e.g., informing investigative enquires, avenues for search and rescue efforts, determination of risk) (College of Policing, 2016;Emanuel et al., 2017;Foy, 2006;Hayden and Shalev-Greene, 2018). The factors found in this study that render an individual particularly at high risk of going missing and harm from each location should be considered in future police risk management and response efforts. Third, the call for the advancement of evidence-informed risk assessment for cases from each location provides an opportunity for police to collaborate with health representatives and other key stakeholders. Given that working closely with the health sectors would allow for the development of knowledge and support on these cases (CAMH, 2019), risk assessment construction is one such area that would assist in rapportand relationship-building among both domains. Fourth, due to the complexities associated with these cases and the potential harm that can result from missing episodes, the police response to cases originating from hospitals and mental health facilities should be prioritized and triaged, particularly according to the risk profiles consisting of the individuals most at-risk of going missing and befalling harm from each place. Lastly, this study indicates that police response and risk assessment should not only be adjusted to consider the factors established in the body of literature as placing one at higher risk for missingness, but also could gather information on the location from which the individual was reported missing and should signify place type as an indicator for potential risk.

Limitations
There are some limitations to the current study that must be addressed. First, these data do not allow for conclusions regarding causality in any meaningful way. To meet the criteria for causality, cross-sectional research designs are not suitable, and temporal precedence regarding the covariates must be established before including them in the analyses (Kraemer et al., 1997). Given that this is likely to be a prevailing issue with missing persons research, future research would benefit from establishing an evidence base surrounding the phenomenon of going missing from hospitals and mental health settings in Canada from a variety of disciplines and perspectives to form critical patterns. Next, listwise deletion was used to exclude any missing values, which resulted in these cases not being included in the analyses.
Also, this data set did not record distinctions between patients who had been detained by police at hospitals or mental health facilities under the Mental Health Act, which means that information is not available on whether the patient was voluntary or involuntary, nor did it include details on whether the person left the hospital with or without formal approval. This limitation was unavoidable given the use of police data. Absence of information on this makes it impossible to offer comparisons between these categories. Future research would benefit from separating the types of patients in analyses in a Canadian context, which could occur with the use of institutional data or analyses of qualitative police data. Finally, although this study examined closed missing person reports over several years from hospitals and mental health units, it would be useful for future work to extend this research by investigating these location types across other police services and additional years. That is, the use of cross-sectional data from one police service in this study means that the findings may not be generalizable to other locations across Canada or globally. Regardless, the results show patterns that do not appear to be due to chance alone as they reflect similar findings in previous literature.

Conclusion
This study contributes to an understanding of descriptive and predictive risk variables associated with the phenomenon of going missing from hospitals compared with mental health facilities. In doing so, factors of which police and health sectors should be particularly aware of for risk assessment and response become apparent. Findings highlight that missing events from each location type is a problem of ample prevalence to warrant greater attention,isolation in police data gathering, and call for future research efforts. This study has demonstrated that there are distinctions in the common and predictive profiles of the missing from hospitals in comparison with mental health facilities, showing that examining the influence of location types on missingness is worthy of further investigation. This work adds to the literature documenting missing persons, particularly in Canada, and offers other factors for consideration in the efforts to profile missing persons.

Declaration of conflicting interests
The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

Funding
The author(s) received no financial support for the research, authorship, and/or publication of this article.

ORCID iD
Lorna Ferguson https://orcid.org/0000-0002-4077-9501 Notes 1. As an example of why these classifications can be important, a recent study by Huey et al. (2020) found that "habitual/chronic" missing person cases ranged from three previous missing person reports to 144 prior reports. 2. "Highest" risk means that these cases represent the greatest concern, such as increased chances of harm and/or the missing episode is an out-of-character behavior. Police risk assessment features several risk factors that are considered when determining such risk and urgency levels (see, for example, British Columbia, 2018).