“…All 34 included studies were published in 2020, of which 15 studies reported prevalence outcomes[18-32] and 31 studies reported death outcomes[7, 18, 21-24, 26-50]. There were 17 cohort studies[7, 19, 20, 23-25, 27, 31, 33, 35, 40, 42, 44-46, 49, 50], 12 case series[21, 30, 34, 36-39, 41, 43, 47, 48], and five cross-sectional studies[22, 26, 28, 29, 32]. The number of samples per study ranged from 3 to 7,154 with a total of 1,944 COVID-19 confirmed cases in 21,873 ESRD patients with RRT from 12 countries in four WHO regions which nine countries were high-income countries and three were upper-middle-income countries according to the World Bank classification[51].…”