Sexual minority health and allostatic load in the National Health and Nutrition Examination Survey: A systematic scoping review with intersectional implications

Abstract

Understood largely from a minority stress framework, sexual minorities (SM) are hypothesized to suffer more physical and mental health burdens compared to their heterosexual counterparts. Several studies have used data from the National Health and Nutrition Examination Survey (NHANES) in the United States to assess SM health disparities and the ‘wear and tear’ of allostatic load. Because findings are generally mixed and sometimes contradictory with sexual minority stress theory, we endeavoured to explore existing NHANES studies of SM health. Our scoping review yielded a comprehensive analysis of all existing published articles (N = 43) that have used the NHANES to assess any outcome regarding SM health and well-being. Our synthesis confirms that SM sub-groups are significantly different from one another and from their heterosexual peers on several key health variables. Surprisingly, gay men appear to have the lowest allostatic load and no differences have yet been identified among women as a function of sexual identity/behavior. The existing literature suggests a need to use the NHANES more broadly and to include more psychosocial variables to better delineate sexual minority stress. This is especially important to consider at a physiological level in allostatic load research that should better include health behaviors available in NHANES and from other available datasets as moderators linking psychosocial exposures (e.g., minority stress) and health outcomes. Suggested future directions are proposed in an intersectional perspective that incorporates interactions among sex, gender, sexual identity/behaviors, race, ethnicity, age cohorts, socioeconomic status, and lived experiences.