Table 2.

Prevalence of answers to quality checklist questions (the 7 critical items are shaded grey).

*‘Unclear’ was assigned when too few details were reported in the manuscript or additional files to make a judgment of assigning ‘Yes’ or ‘No’.

**The required sample size was calculated with EpiTools epidemiological calculators and was based on the identified prevalence and the total sample size³³. The estimated prevalence was calculated with a 0.95 confidence level (desired precision of estimate 0.05).