“…Ideally, sample sizes between categories are balanced for sex-and gender-sensitive comparisons in order to assure enough power or avoid bias. In 18 studies (Al Banna et al, 2020;Alonzi et al, 2020;Antunes et al, 2020;Blbas, Aziz, Nejad, & Barzinjy, 2020;Capraro & Barcelo, 2020;Civantos et al, 2020;Guo et al, 2020;Khanna, Honavar, Metla, Bhattacharya, & Maulik, 2020; Lee, Mathis, Jobe, Systematic Review: Sex-and gender-sensitive research on mental health during COVID-19 & Pappalardo, 2020;Madani, Boutebal, & Bryant, 2020;Olaseni, Oguntayo, Agberotimi, & Akinsola, 2020;Olcaysoy Okten et al, 2020;Ćzdin & Bayrak Ćzdin, 2020;Pillay et al, 2020;Varshney et al, 2020;Verma & Mishra, 2020;Zhuo, Gao, Wang, Zhang, & Wang, 2020) there was a predominance of male participants. Furthermore, one study reported an equal amount of male and female participants (Balkhi, Nasir, Zehra, & Riaz, 2020) and for one study, numbers of male and female participants were not presented .…”