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Published Online: 15 December 2016

Characteristics of Hospital Emergency Room Visits for Mental and Substance Use Disorders

Abstract

Objective:

This study compared characteristics of visits to emergency rooms (ERs) for mental and substance use disorders and for physical health conditions to establish a baseline against which to measure changes after full implementation of the Affordable Care Act (ACA) and parity legislation.

Methods:

The retrospective, cross-sectional analysis fit a logistic regression model to pooled data comprising 193,526 observations from National Hospital Ambulatory Medical Care Survey (NHAMCS) data from 2005 to 2011.

Results:

ER visits for mental or substance use disorders increased from 27.9 per 1,000 ER visits in 2005 to 35.1 in 2011. Homeless persons and nursing home residents had the highest rates of such visits—173.7 and 95.2 per 1,000 ER visits, respectively, in 2011.

Conclusions:

Understanding differences in profiles of ER visits on the basis of the reason for the visit can inform the design of more cost-effective policies to guide ER intake, after further implementation of the ACA and parity legislation.
About 17.5% of U.S. adults and more than 9% of the population 11 years and older have a diagnosed substance use disorder (1). Since deinstitutionalization, the formal care sector has emphasized community care rather than hospital admission for mental and substance use disorders. However, inadequate insurance coverage, a shortage of mental health services and professionals, inefficient triage practice systems, and the high cost of mental health services (2) channel individuals with mental and substance use disorders to hospital emergency rooms (ERs) (3), which imposes a major strain on limited health care resources (4). No estimates of spending on ER visits for mental and substance use disorders have been published. However, in general, almost 6% of U.S. health care dollars are spent on mental health, and the national expenditure on services for mental and substance use disorders rose 7.9% in the first quarter of 2015 compared with the same period in 2014 (5). Although specialty mental health providers are projected to remain major recipients of spending on mental and substance use disorders, the share received by nonspecialty providers, including ER and outpatient providers, is projected to rise from 28% in 2009 to 30% in 2020 (6).
In the 1990s and early 2000s, significant increases were noted in ER visits for mental health reasons. From 1992 to 2001, the annual number of ER visits increased by 20%; however, the per-person trend for mental health–related visits increased by nearly 40%—from 17.1 visits per 1,000 population in 1992 to 23.6 visits per 1,000 population in 2001 (4). Researchers found that African Americans had higher visit rates than whites, that Medicaid enrollees made more ER visits than privately insured and uninsured persons, and that individuals with psychiatric conditions were more likely than those with general medical conditions to be admitted to the hospital (7,8).
This brief report presents a profile of visits to hospital ERs for mental and substance use disorders from 2005 to 2011. Data were from the National Hospital Ambulatory Medical Care Survey (NHAMCS) database. The focus of our study is important in the context of the unfolding of the Affordable Care Act (ACA), which mandates provision of mental health services as essential health benefits for insured persons, and the Mental Health Parity and Addiction Equity Act (MHPAEA). This study sought to establish a baseline against which future changes can be compared after the ACA and MHPAEA are fully implemented.

Methods

This study compared characteristics of ER visits for mental and substance use disorders and visits for physical health conditions. The study was a retrospective, cross-sectional analysis of NHAMCS data from 2005 to 2011. The NHAMCS is an annual survey of hospital visits conducted by the Centers for Disease Control and Prevention’s National Center for Health Statistics (CDC/NCHS) and includes data on the use and provision of ambulatory and emergency care services in nonfederal and non–Department of Veterans Affairs hospitals in all 50 states and the District of Columbia.
The outcome variable was ER visits for 2005 to 2011. Mental health visits were identified by using CDC/NCHS reason-for-visit codes, such as 1100.0 (anxiety and nervousness), 1110.0 (depression), 1155.0 (delusions or hallucination), 1145.0 (alcohol-related problems), 2321.0 (drug dependence), 5820.1 (intentional overdose), and a host of others. The independent variables in our regression model included demographic variables, such as gender, race-ethnicity, age, region of residence, residential status, and insurance coverage. We also controlled for discharge status from any hospital within the past seven days to document complications and indicate quality of inpatient care; whether the patient was seen in the past 72 hours, an indicator of the quality of care or follow-up for patients lacking a customary source of care outside the ER; and hospital ownership status to identify differences in ownership, resource capacity, demographic factors, and competitive characteristics (9) of public facilities compared with other types of ownership. The regression model also included indicators for each calendar year.

Results

Descriptive statistics comparing ER use for mental and substance use disorders in 2005 and 2011 indicated an increasing trend—from a rate of 27.9 per 1,000 ER visits in 2005 to 35.1 per 1,000 in 2011. [A table in an online supplement to this report presents descriptive statistics.] Overall, the mean±SD age of persons with ER visits for mental and substance use disorders was 39.9±.41 years. From 2005 to 2011, the number of ER visits for mental and substance use disorders increased significantly for all age groups over six years. The increase was highest for the 25- to 44-year group—from 32.7 per 1,000 ER visits in 2005 to 42.3 per 1,000 ER visits in 2011. The increasing trend in such visits was significant and consistent over time for both males and females. The rate for males increased from 32.9 per 1,000 visits in 2005 to 38.7 per 1,000 visits in 2011, and the respective increase for females was from 23.7 to 32.2. The data also showed that homeless persons and nursing home residents had the highest rate of ER visits for mental and substance use disorders (173.7 and 95.2 per 1,000 ER visits, respectively).
Table 1 presents results of a logistic regression examining variables as predictors of ER visits for mental and substance use disorders. The overall model goodness of fit to the 193,526 data points was reasonably good, compared with an intercept-only model (likelihood ratio χ2=3,919.82, df=24, p<.001).
TABLE 1. Logistic regression analysis of variables as predictors of emergency room (ER) visits for mental and substance use disorders
VariableOR95% CIp
Male (reference: female)1.271.16–1.38<.001
Race-ethnicity (reference: white)   
 Hispanic.67.57–.78<.001
 African American.79.69–.89<.001
Age (reference: ≥65)   
 <18.80.66–.97.02
 18–241.381.14–1.68<.001
 25–441.601.36–1.88<.001
 45–641.501.29–1.76<.001
Residential status (reference: private residence)   
 Nursing home3.162.61–3.84<.001
 Homeless6.365.03–8.04<.001
Insurance status (reference: private insurance)   
 Uninsured1.301.12–1.50<.001
 Medicare1.661.45–1.89<.001
 Medicaid1.651.49–1.84<.001
Hospital discharge in past 7 days (reference: no)1.491.21–1.84<.001
Seen in ER in past 72 hours (reference: no).93.79–1.10.38
Public hospital (reference: all other types)1.03.88–1.21.72
Region (reference: Northeast)   
 South.61.50–.75<.001
 Midwest.81.67–.97.02
 West.72.61–.87<.001
Covariates in the fitted model were statistically significant, except for two: the binary indicators for being seen in an ER in the past 72 hours and ownership status of the hospital. Men were 1.27 times as likely as women to visit the ER for mental and substance use disorders. Compared with white patients, Hispanic and African-American patients were less likely to visit the ER for mental and substance use disorders. Compared with visits by individuals age 65 and older, all age groups were more likely to visit the ER for mental and substance use disorders, except for children under age 18. Compared with persons who lived in their own homes, homeless persons were 6.36 times as likely and nursing home residents were 3.16 times as likely to make such visits.
Compared with patients with private insurance, uninsured patients, Medicare enrollees, and Medicaid enrollees were, respectively, 1.30, 1.66, and 1.65 times as likely to visit the ER for mental and substance use disorders. Patients who had been discharged from a hospital within the past seven days were 1.49 times as likely as those who had not been discharged in the past seven days to make an ER visit for mental and substance use disorders. Compared with people living in the Northeast, those living in the South, Midwest, and West were less likely to visit the ER for mental or substance use disorders.

Discussion and Conclusions

Since passage of the ACA and the MHPAEA, more individuals who visit the ER for mental and substance use disorders have health insurance coverage. The aim of this study was to establish a baseline against which future changes in the ER visits for mental and substance use disorders can be compared after the ACA and MHPAEA are fully implemented.
We fit a logistic regression model to the 2005 to 2011 NHAMCS data to profile characteristics of ER visits for mental and substance use disorders. Among significant predictors of such visits in the estimated model were being homeless or being a nursing home resident (compared with living in a private residence). Our finding on homelessness is in line with a previous study of why the provision of emergency care in U.S. hospitals is costly (10). The finding about nursing home residents agrees with results of another study, which showed that nursing home patients were routinely transferred to hospital ERs for general medical and mental health conditions, even though such hospitalizations were avoidable (2). As noted in previous studies, low-cost and effective collaborations among hospitals, nursing homes, and community outpatient services could reduce high rates of ER use among nursing home residents. Although more U.S. females than males are reported to have a mental illness, studies have indicated that males are more likely to visit ERs for mental health problems (3). Because of gender-specific physiology and other factors, females tend to be better seekers of health care and more frequent users of health care resources (11); however, seeking care and having a regular source of care are influenced by several factors, including availability of services and health insurance coverage. Compared with white patients, Hispanic and African-American patients were less likely to visit the ER for mental and substance use disorders, a finding echoing the greater relative deaths from conditions related to mental health recently observed among less educated whites (12). In this study, we found a significant correlation between insurance coverage and ER visits for mental and substance use disorders, compared with physical health conditions. Compared with patients with private insurance, uninsured patients were more likely to visit the ER for mental and substance use disorders, as were Medicare and Medicaid enrollees—although the odds were not as high as for uninsured patients. The statistically significant findings on gender are consistent with other studies which find gender differences in health services utilization (13,14).
The profile of ER visits for mental and substance use disorders in U.S. hospitals differed significantly from the profile of ER visits for physical health conditions. As the consequences of ACA and MHPAEA implementation become clearer, understanding the difference in these profiles can help inform the design of more cost-effective policies to guide ER intake. In addition, our findings that patients with different reasons for visiting the ER also differed in region of residence, socioeconomic status, and living arrangement can help inform policies that target the needs of specific populations. The findings could also be used to plan for and ensure that the ER team has an appropriate mix of clinical skills. Although our study fills an important void regarding an increasingly important health policy issue, future research should focus on the cost implications and outcomes of ER use for mental and substance use disorders.

Supplementary Material

File (appi.ps.201600125.ds001.pdf)

References

1.
Frakt AB, Bagley N: Protection or harm? Suppressing substance-use data. New England Journal of Medicine 372:1879–1881, 2015
2.
Alakeson V, Pande N, Ludwig M: A plan to reduce emergency room “boarding” of psychiatric patients. Health Affairs 29:1637–1642, 2010
3.
Results From the 2011 National Survey on Drug Use and Health: Mental Health Findings. Pub no (SMA) 12-4725. Rockville, Md, Substance Abuse and Mental Health Services Administration, 2012
4.
Larkin GL, Claassen CA, Emond JA, et al: Trends in US emergency department visits for mental health conditions, 1992 to 2001. Psychiatric Services 56:671–677, 2005
5.
Caffery MK: As mental health advocates press for parity, insurers and states want more time. American Journal of Managed Care (Epub June 15, 2015). http://www.ajmc.com/focus-of-the-week/0615/as-mental-health-advocates-press-for-parity-insurers-and-states-want-more-time
6.
Projections of National Expenditures for Treatment of Mental and Substance Use Disorder, 2010–2020. HHS pub no SMA-14-4883. Rockville, Md, Substance Abuse and Mental Health Services Administration, 2014
7.
Hazlett SB, McCarthy ML, Londner MS, et al: Epidemiology of adult psychiatric visits to US emergency departments. Academic Emergency Medicine 11:193–195, 2004
8.
Weber EJ, Showstack JA, Hunt KA, et al: Does lack of a usual source of care or health insurance increase the likelihood of an emergency department visit? Results of a national population-based study. Annals of Emergency Medicine 45:4–12, 2005
9.
Horwitz JR, Nichols A: Hospital ownership and medical services: market mix, spillover effects, and nonprofit objectives. Journal of Health Economics 28:924–937, 2009
10.
Sadowski LS, Kee RA, VanderWeele TJ, et al: Effect of a housing and case management program on emergency department visits and hospitalizations among chronically ill homeless adults: a randomized trial. JAMA 301:1771–1778, 2009
11.
Green CA, Pope CR: Gender, psychosocial factors and the use of medical services: a longitudinal analysis. Social Science and Medicine 48:1363–1372, 1999
12.
Case A, Deaton A: Rising morbidity and mortality in midlife among white non-Hispanic Americans in the 21st century. Proceedings of the National Academy of Sciences, 2015. http://www.pnas.org/content/112/49/15078
13.
Raine R: Does gender bias exist in the use of specialist health care? Journal of Health Services Research and Policy 5:237–249, 2000
14.
Giefing-Kröll C, Berger P, Lepperdinger G, et al: How sex and age affect immune responses, susceptibility to infections, and response to vaccination. Aging Cell 14:309–321, 2015

Information & Authors

Information

Published In

Go to Psychiatric Services
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Cover: Freeway and Aqueduct, by Richard Diebenkorn, 1957. Oil on canvas. Gift of William and Regina Fadiman (M.86.68). Los Angeles County Museum of Art, Los Angeles. Digital image © 2017 Museum Associates/LACMA, Licensed by Art Resource, New York City.

Psychiatric Services
Pages: 408 - 410
PubMed: 27974000

History

Received: 11 March 2016
Revision received: 16 June 2016
Revision received: 3 August 2016
Accepted: 10 August 2016
Published online: 15 December 2016
Published in print: April 01, 2017

Keywords

  1. Outpatient treatment
  2. Mental illness &amp alcohol/drug abuse
  3. Economics
  4. Emergency room

Authors

Details

Toluwalope Ayangbayi, M.Sc., M.D.
Dr. Ayangbayi and Dr. Okunade are with the Department of Economics and Center for Healthcare Economics, University of Memphis, Memphis, Tennessee. Dr. Karakus is with Westat, Rockville, Maryland. Dr. Nianogo is with the United Nations Development Programme, New York City. Send correspondence to Dr. Okunade (e-mail: [email protected]).
Albert Okunade, M.S., Ph.D.
Dr. Ayangbayi and Dr. Okunade are with the Department of Economics and Center for Healthcare Economics, University of Memphis, Memphis, Tennessee. Dr. Karakus is with Westat, Rockville, Maryland. Dr. Nianogo is with the United Nations Development Programme, New York City. Send correspondence to Dr. Okunade (e-mail: [email protected]).
Mustafa Karakus, M.A., Ph.D.
Dr. Ayangbayi and Dr. Okunade are with the Department of Economics and Center for Healthcare Economics, University of Memphis, Memphis, Tennessee. Dr. Karakus is with Westat, Rockville, Maryland. Dr. Nianogo is with the United Nations Development Programme, New York City. Send correspondence to Dr. Okunade (e-mail: [email protected]).
Thierry Nianogo, M.Sc., Ph.D.
Dr. Ayangbayi and Dr. Okunade are with the Department of Economics and Center for Healthcare Economics, University of Memphis, Memphis, Tennessee. Dr. Karakus is with Westat, Rockville, Maryland. Dr. Nianogo is with the United Nations Development Programme, New York City. Send correspondence to Dr. Okunade (e-mail: [email protected]).

Competing Interests

The authors report no financial relationships with commercial interests.

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