Nativity, Race-Ethnicity, and Dual Diagnosis among US Adults.

Purpose This study investigated disparities in dual diagnosis (comorbid substance-use and depressive/anxiety disorders) among US adults by nativity and racial-ethnic origin and socioeconomic, cultural, and psychosocial factors that may account for the observed disparities. Design/methodology The study drew on data from two waves of the National Epidemiological Survey on Alcohol and Related Conditions. Racial-ethnic categories included African, Asian/Pacific Islander, European, Mexican, Puerto Rican, and other Hispanic/Latino. Substance-use and depressive/anxiety disorders were assessed per DSM-IV. A four-category measure of comorbidity was constructed: no substance-use or psychiatric disorder; substance-use disorder only; depressive/anxiety disorder only; and, dual diagnosis. The data were analyzed using multinomial logistic regression. Findings The prevalence of dual diagnosis was low but varied by nativity, with the highest rates among Europeans and Puerto-Ricans born in US states, and the lowest among Mexicans and Asians/Pacific Islanders. The nativity and racial-ethnic effects on likelihood of having dual diagnosis remained significant after all adjustments. Research limitations The limitations included measures of immigrant status, race-ethnicity, and stress and potential misdiagnosis of mental disorder among ethnic minorities. Practical and Social Implications This new knowledge will help to guide public health and health care interventions addressing immigrant mental and behavioral health gaps. Originality/value This study addressed the research gap in regard to the prevalence and correlates of dual diagnosis among immigrants and racial-ethnic minorities. The study used the most current and comprehensive data addressing psychiatric conditions among US adults and examined factors rarely captured in epidemiologic surveys (e.g., acculturation).