Study characteristics
Of the 21 studies, 14 focused on mental health outcomes [65,66,67,68,69,70,71,72,73,74,75,76] and examined topics such as resilience, coming out, and experiences of discrimination. Five focused on sexual and reproductive health (SRH) [44, 77,78,79,80,81]. We found one study on each of the following topics: substance use/addiction [82], the effects of COVID-19 [83], and aging [66]. Some studies focused on more than one topic [44, 82], such as SRH, mental health, and substance use/addiction [82]. Nine studies used quantitative methods [68, 70, 72, 77, 79,80,81,82,83], and seven studies used qualitative methods [44, 66, 67, 69, 71, 74, 75]. Three studies used ethnographic fieldwork methods [44, 76, 78], and two used mixed methods [84]. Most studies were conducted in Poland (n = 10); two studies…