The prevalence of overactive bladder and nocturnal enuresis in Japanese early adolescents : a questionnaire survey

Abstract

広島県内の2つの中学校に在籍する全生徒624名を対象に, 排尿症状に関する匿名アンケート調査を施行した.質問事項は年齢, 性別, 既往歴, 排尿症状および排便症状で, 過活動膀胱(OAB)は頻尿(昼間8回以上)または切迫性尿失禁(月1回以上)と定義した.その結果, 1)回答率は32.4%で, 平均昼間排尿回数5.0±2.2回(2～14回), 頻尿10.4%, 夜間頻尿4.0%であった. 2)OAB, 夜尿症の罹患率は各々15.3%(95%信頼区間10.4～20.3%), 3.0%(95%信頼区間0.65～5.4%)でいずれも年齢とともに減少していた. 3)OABの19.4%に夜間頻尿を認めた

To assess the prevalence of overactive bladder (OAB) and nocturnal enuresis (NE) in early adolescents, we distributed an anonymous questionnaire about urinary symptoms to 624 middle school students aged 13 and 15 years. The questionnaire included items regarding age, gender, past and present diseases, urinary symptoms and bowel habits. OAB was defined as symptoms of increased daytime frequency occurring more than eight times during the daytime and/or urge incontinence occurring at least once a month. The overall response rate to the questionnaire was 32.4%, and the mean age +/- SD of all respondents was 13.9 +/- 0.89 years. The prevalence of OAB was 15.3% of all respondents (95% CI, 10.4-20.3%; 4.2-16.1% of boys and 12.5-28.3% of girls). The prevalence of OAB decreased with age from 17.6% of respondents aged 13-year-olds to 11.8% of 15-year-olds. The mean daytime frequency was 5.0 +/- 2.2 times. Increased daytime frequency was found in 10.4% (95% CI, 6.2-14.6%; 2.7-13.5% of boys and 6.1-19.0% of girls) and nocturia in 4.0% (95% CI, 1.3-6.7%). The prevalence of NE was 3.0% (95% CI, 0.65-5.4%; three boys and three girls). The results of this study demonstrate that some early adolescents had OAB or NE. Further large-scale studies would be required to investigate the prevalence and natural history of OAB and NE.