I PREVALENCE STUDIES [27] Was the sample frame appropriate to address the target population? Were study participants sampled in an appropriate way? Was the sample size adequate? Were the study subjects and the setting described in detail? Was the data analysis conducted with sufficient coverage of the identified sample? Were valid methods used for the identification of the condition? Was the condition measured in a standard, reliable way for all participants? Was there appropriate statistical analysis? Was the response rate adequate, and if not, was the low response rate managed appropriately?
Author	Q1	Q2	Q3	Q4	Q5	Q6	Q7	Q8	Q9
Atreya et al. (2020) [50]	NA	NA	NA	Y	Y	Y	Y	Y	NA
Alterio et al. (2020) [34]	UC	UC	UC	Y	Y	Y	Y	Y	NA
Biswas et al. (2020) [51]	Y	UC	UC	Y	Y	Y	Y	Y	UC
de Marinis et al. (2020) [36]	NA	NA	NA	Y	NA	Y	Y	Y	NA
Frey et al. (2020) [62]	N	UC	UC	Y	Y	Y	Y	Y	UC
Kwek et al. (2021) [47]	Y	UC	N	Y	Y	Y	Y	Y	N
Mahl et al. (2020) [63]	Y	UC	UC	Y	Y	N	Y	Y	UC
Merz et al. (2021) [43]	Y	UC	UC	Y	Y	N	Y	Y	UC
Mitra et al. (2020) [64]	Y	Y	UC	Y	Y	Y	Y	Y	Y
Patt et al. (2021) [53]	Y	UC	UC	Y	Y	N	Y	Y	UC
Patt et al. (2020b) [54]	Y	NA	UC	Y	Y	Y	Y	Y	UC
Rodler et al. (2020) [57]	Y	UC	Y	Y	Y	N	Y	Y	Y
Sawka et al. (2021) [37]	UC	UC	UC	Y	Y	Y	Y	Y	UC
Smrke et al. (2020) [55]	Y	UC	UC	Y	Y	Y	Y	Y	Y
Somani et al. (2020) [58]	Y	NA	NA	Y	Y	Y	Y	Y	NA
Sonagli et al. (2021) [46]	UC	UC	UC	Y	Y	Y	Y	Y	NA
Zuliani et al. (2020) [60]	Y	UC	UC	Y	Y	Y	Y	Y	UC