Background: Alcohol use disorders (AUD) occur frequently in sexual minority (SM) adults (identifying as gay, lesbian or bisexual). Age-specific prevalence estimates, particularly during middle and older ages, remain obscure. With questions for sexual identity recently included in the National Survey of Drug Use and Health (NSDUH), increased precision is possible. This study investigates the age-specific estimate for AUD in sexual minority versus sexual majority adults.
Methods: Analysis of the 2015-2017 NSDUH, ages 18-years-and-older (N = 128,740). We estimate age-specific, 12-month DSM-IV AUD prevalence and adjusted prevalence ratios (via Poisson regression) by sexual identity. Adjusted models control for demographic, social, and mental health variables. Post-hoc analysis included age-specific estimates after redefining SM to include any same-sex attraction.
Results: The age-specific estimate showed peak AUD prevalence at age ∼28 for all SMs, compared to age ∼23 for heterosexuals. By subgroup, gay men ages 18-23, had the highest AUD prevalence at 18.8% (CI: 13.5%, 25.5%). Bisexual women ages 24-29 had the highest disparity, a prevalence ratio (reference heterosexual women) of 2.59 (CI: 2.15, 3.13). Above age 50, the definition of SM is salient: in this age group, prevalence of AUD converges for heterosexuals and SMs that include individuals with any same-sex attraction.
Conclusion: In this largest study to date, SMs have a high prevalence of AUD. A disparity in the age-by-age estimates emerges by age 25 when AUD occurrence declines in heterosexuals but increases in SMs. A prevalence disparity occurs with each successive age strata, but by age 50-and-older, the difference is null.
Keywords: Alcohol use disorders; Bisexual; Disparities; Gay/lesbian; Psychiatric disorders; Sexual minorities (SMs).
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