Suicide is among the leading causes of death in the United States, claiming more than twice as many lives as homicide (
1). After cancer and heart disease, suicide accounts for more years of life lost than any other cause of death (
2). Consequently, a specific goal of the National Strategy for Suicide Prevention is the development of programs aimed at improving the ability of general medical and mental health care providers to identify and treat persons at risk of suicide (
3). Toward this end, information about health services received by persons who later die by suicide is needed, including their characteristics and patterns of service use before suicide.
Findings from a small but growing number of studies of U.S. samples suggest that contact with health services in the year before suicide is common, particularly with general medical rather than mental health providers. A review of European, Australian, and American studies conducted between 1954 and 1997 found that an average of 77% of suicide decedents made a primary care visit and 32% had a mental health service visit within a year of death (
4). High rates of service use in the year before suicide have been reported in recent U.S. studies of male Veterans Health Administration (VHA) patients with substance abuse disorders (94.6%) (
5), VHA patients in two geographic areas (90%) (
6), and a large population of health maintenance organization enrollees in a mental health research network (83%) (
7). Most visits were to primary care or general medical specialty providers. Approximately half of decedents made a health care visit within a month of suicide (
6,
7).
To our knowledge, no studies have examined health service contacts of suicide decedents in a Medicaid population. It is important to address this gap for several reasons. First, Medicaid is the primary health insurer for poor or disabled individuals in the United States, covering over 66 million Americans—more than one in every five—at some point during the year (
8). Second, although suicide prevalence among Medicaid recipients is unknown, rates of mental illness in this population exceed national estimates (48% among Medicaid enrollees versus 31% nationally). Discontinuities in coverage, low literacy, language barriers, lack of transportation, unstable housing, unstable employment, and poverty all place Medicaid recipients at heightened risk of suicide (
9). Third, because Medicaid recipients experience many social and economic challenges that affect their health and ability to navigate the health care system, it is possible that clinical profiles and service use patterns prior to suicide may differ from those reported in other studies.
This study aimed to inform suicide prevention efforts by describing the clinical profiles and health care utilization of Ohio Medicaid enrollees who died by suicide. The specific goals were to estimate the condition-specific incidence of suicide among adult Medicaid enrollees, identify the type of visits (general medical or mental health) and the timing and frequency of visits in the year before suicide, compare the characteristics of decedents who did and did not seek care in the month and year prior to suicide, and examine factors associated with type of visits (general medical only, mental health only, or both) among decedents who sought services within a month of suicide.
Discussion
In this study of Medicaid-enrolled adult suicide decedents in Ohio, the suicide rate of 18.9 per 100,000 is higher than that in the general U.S. population (12.6 per 100,000) and in Ohio (16.3 per 100,000) (
13). The condition-specific suicide rates underscore that Medicaid enrollees with psychiatric disorders, especially in combination with substance use disorders and chronic general medical conditions, are a group at particularly high risk of suicide.
The findings regarding the timing and type of health care visits prior to suicide are broadly consistent with those of other studies (
5–
7,
14). Eighty-three percent of decedents had a health care visit within one year of death, 50% had a visit within one month, and 27% within one week. In the year prior to suicide, 79% of the sample had general medical visits and 55% had mental health visits. Most of these visits (79%) were in outpatient settings. Therefore, health care visits, whether for general medical or behavioral health conditions, are opportunities to identify and intervene with individuals at risk of suicide. Although universal screening for suicidality in ambulatory and general medical settings is difficult to justify in the absence of a responsive system of care, general medical and behavioral health professionals might productively direct case-finding efforts toward Medicaid enrollees with known disability, psychiatric disorders, substance use disorders, and chronic general medical illness, particularly those with co-occurring disorders. Tools, such as the Columbia Suicide Severity Rating scale (
15) or the Patient Health Questionnaire (
16), might prove useful, and state Medicaid programs should explore incentives to facilitate case finding in these populations at risk of suicide.
Data on the frequency of visits indicate that a portion of decedents were intensive service users, and these individuals had severe clinical profiles. Decedents who had more problems, as measured by all types of co-occurring conditions, were more likely than those without co-occurring conditions to have made visits within a month of suicide. In addition, decedents who received care in the month prior to suicide tended to be seen in settings consistent with their clinical profiles: those with serious psychiatric disorders were more likely than those without such disorders to make mental health visits, and those with chronic general medical conditions were more likely than those without such conditions to make general medical visits. Taken together, these results suggest that it is feasible to develop algorithms to identify high-risk Medicaid enrollees on the basis of co-occurring psychiatric, substance use, and chronic general medical conditions and a history of at least monthly health care encounters of any type.
Medicaid programs may want to consider incorporating suicide-specific initiatives into their existing efforts to manage the care of high-cost and vulnerable participants. Alternatives include availability of peer supporters to help coordinate general medical and behavioral health care and better access to and sharing of electronic health records of all general medical and behavioral health care providers involved in the client’s treatment. In addition, Medicaid programs may want to consider adopting VHA protocols that mandate the use of a standard safety plan or annual suicide risk assessments (
6) for recipients identified as high risk.
Given the relationship between comorbid disorders and acute suicide risk, improvements in the detection and documentation of mental illness among persons with chronic general medical conditions may be necessary—particularly in primary care, where mental health and suicide screenings typically do not occur (
17–
19). Individuals with chronic general medical conditions may not perceive a need for mental health services, may have a negative view of such services, or may lack encouragement from family or friends (
14,
20). Further justification for these improvements comes from discrepancies between autopsy studies, which have estimated that 90% of those who die by suicide have a mental disorder (
21,
22), and the absence of psychiatric disorders in case records of suicide decedents.
Slightly less than one-fifth (17%) of the decedents in the sample did not use any services in the year before suicide. Outreach and intervention approaches must be tailored accordingly. For example, the nonutilizers in this study were more likely to reside in rural areas and to have discontinuous Medicaid enrollment. Automated reminders of the importance of annual health care visits or mobile apps to help individuals identify providers who are accepting new patients or Medicaid patients could facilitate care, especially for rural residents. Because of shortages of primary and behavioral health care providers in rural areas, investments in mobile clinics and incentives for providers to offer telehealth services should be considered (
23). Finally, disenrollment notifications should provide contact information for free or low-cost resources, such as suicide hotline numbers.
This study had several limitations. First, as with all studies that use data from death certificates, it is possible that the number of suicides was underestimated. Second, data were from a single state’s Medicaid program, and results may not apply to other state Medicaid programs given the difference in services and reimbursement options. Also, findings may not be applicable to decedents with other payment sources, such as Medicare and private insurance. Nevertheless, findings about the timing and type of care mirror those of other studies, suggesting broad generalizability. At the same time, the findings reinforced the fact that variations in care on the basis of individual characteristics are likely to differ by payment source. Because of the unique role of Medicaid in the United States, replication of this study with Medicaid data from states that have different treatment landscapes and Medicaid reimbursement levels is warranted. Finally, the study did not include decedents enrolled in Medicaid since 2014, when Ohio expanded Medicaid eligibility under the Affordable Care Act. Medicaid eligibility and service reimbursement rules are in a state of flux. The impact of changes in eligibility and service reimbursement on suicide should be examined in a future study.