14781-koppen

37 Prevalence of functional defecation disorders 1 TABLE 1. Studies on prevalence FC ( n =35) Study, year Country Population Sample size, number (%males) Age (years) Method of data collection Case definition Prevalence FC, number (%) F:M ratio Asia AlGhamdi, 2017 17 Saudi Arabia Well-baby clinic sample 80 (46.3) 0-5 Parental interview Rome III criteria 18 (22.5) 0.5:1 Bhatia, 2016 18 India School sample (4 schools) 1115 (n/a) 10-17 Child questionnaire QPGS-RIII in Hindi † 6 (0.5) n/a Devanarayana, 2011 19 Sri Lanka School sample (1 school) 427 (50.1) 12-16 Child questionnaire QPGS-RIII in Sinhalese † 18 (4.2) n/a Devanarayana, 2010 20 Sri Lanka School sample (5 schools) 2699 (50.7) 10-16 Child questionnaire QPGS-RIII in Sinhalese † 416 (15.4) 0.8:1 Liu, 2009 21 China Community sample 5030 (49.9) 0-24 m Parental questionnaire Rome III criteria 690 (13.7) n/a Osatakul, 2014 22 Thailand Well-baby clinic sample 3010 (51.3) 4-60 m Parental interview Rome III criteria 48 (1.6) n/a Park, 2016 23 Korea Day-care sample 212 (53.1) 25-84 m Parental interview Rome III criteria 18 (8.5) 1.1:1 Rajindrajith, 2017 24 Sri Lanka School sample (4 schools) 1792 (54.4) 13-18 Child questionnaire QPGS-R III in Sinhalese † 138 (7.7) 0.5:1 Ranasinghe, 2017 25 Sri Lanka School sample (5 schools) 1697 (45.9) 13-18 Child questionnaire QPGS-R III in Sinhalese † 114 (6.7) 1:1 Sagawa, 2013 26 Japan School sample (40 schools) 3976 (46.4) 10-17 Child questionnaire QPGS-RIII in Japanese † 12 (0.3) 2:1 Shau, 2016 27 Taiwan School sample (8 schools) 2034 (49.3) 12-19 Child interview Rome III questionnaire in Taiwanese † 364 (17.9) n/a Tam, 2012 28 China School sample (10 schools) 2318 (51.0) 6-15 Parental questionnaire Rome III criteria 282 (12.2) 1.1:1 Wu, 2011 29 Taiwan School sample (8 schools) 2375 (54.0) 7-12 Child questionnaire Modified Rome III criteria a 767 (32.2) 1.2:1* Xu, 2008 30 China School sample (14 schools) 1022 (49.2) 2-6 Parental questionnaire Rome III criteria 32 (3.1) 1.6:1 Zhang, 2010 31 China City sample (5 cities) 19286 (55.8) 4-14 Child/parental questionnaire Rome III criteria 913 (4.7) 1:1 Zhou, 2010 32 China School sample (6 schools) 2075 (48.4) 10-18 Child questionnaire Rome III criteria 130 (6.3) 1.6:1