Body dissatisfaction and sexual orientations: A quantitative synthesis of 30 years research findings.

Previous research studies on the relationship between body dissatisfaction and sexual orientation in men and women showed inconsistent results. To better understand this body of research, we conducted a quantitative synthesis based on a three-level random-effects meta-analytic model. In total, we analyzed 229 effect sizes from 75 primary studies published between 1986 and 2019. Results showed that sexual minority men had a higher level of body dissatisfaction than heterosexual men (57 studies, 128 effect sizes), with a small to medium effect size (d = 0.34; 95% CI: 0.28, 0.39). Other comparisons-bisexual men vs. gay men (6 studies, 9 effect sizes), sexual minority women vs. heterosexual women (36 studies, 85 effect sizes), and bisexual women vs. lesbian women (6 studies, 7 effect sizes)-showed smaller and statistically insignificant differences. Moderator analyses revealed that the inconsistency in previous studies comparing sexual minority men and heterosexual men could be partially explained by specific study features, including publication year, survey method, participants' age, participants' BMI, and measures used to assess body dissatisfaction. The inconsistent findings in comparing sexual minority women and heterosexual women could be partially explained by the different survey methods used in previous studies. Explanations and implications are discussed.