“…We identified that studies using Rome II criteria reported the highest constipation rate, reaching 27.4% in children from three community-based studies in East Asia. 17 , 22 , 25 Upon analysing 20 studies using Rome III criteria, the constipation rate was 12.3%; these studies included data obtained from 16 community-based studies, 24 , 27 , 28 , 30 , 33 , 35 , 36 , 40 , 41 , 42 , 45 , 47 , 49 , 51 , 54 , 55 and four clinical studies. 37 , 43 , 46 , 52 Meanwhile, the constipation rate diagnosed with the Rome IV was the lowest, at 4.4%, based on data analysed from five clinic-based studies, 50 , 56 , 57 , 58 , 62 and four community-based studies.…”