“…These studies were scored with “N/A” on the study participation domain (n = 32; 60%) (Table 2). 5,13,16,18,20,28,30,32,36,37,43,45‐47,51‐58,60,61,64,65,68,69,72,73,75,77 Eleven studies (21%) did not report attrition rate 13,19,33,35,51,55,61,70,72,73,77 . Some did not report the attrition rate because only the patients with complete data were included.…”