Prevalence and associated factors of overactive bladder in Korean children 5-13 years old: a nationwide multicenter study.
OBJECTIVE
To estimate the prevalence of overactive bladder (OAB) in Korean children, 5-13 years of age, and to assess the associated factors for OAB.


METHODS
A randomly selected cross-section study was conducted in 26 kindergartens and 27 elementary schools nationwide in Korea. A total of 19 240 children were included; a parent was asked to complete the questionnaires, which included items about OAB and voiding and defecating habits. OAB was defined as urgency with or without urge incontinence, usually with increased daytime frequency and nocturia (International Children's Continence Society, 2006). Its prevalence and associated factors were also investigated.


RESULTS
The response rate for the questionnaires was 85.84%. The overall prevalence of OAB was 16.59%. The prevalence of OAB decreased with age from 22.99% to 12.16% (P = .0001). The overall incidence of wet and dry OAB was 26.97% and 73.03%, respectively. Compared with normal children, those with OAB had a greater prevalence of nocturnal enuresis, constipation, fecal incontinence, urinary tract infection, delayed bladder control, and poor toilet facilities (P < .05). The incidence of increased daytime frequency and urge incontinence was 3.69% and 2.31% (P = .009) and 26.97% and 14.78% (P = .0001) in OAB and non-OAB children, respectively. The corresponding prevalence decreased with age from 5.04% to 3.06% and from 45.74% to 18.50% in OAB children (P = .0001).


CONCLUSIONS
The overall prevalence of OAB in Korean children, 5-13 years of age, was 16.59% and decreased with age. Nocturnal enuresis, constipation, fecal incontinence, history of urinary tract infection, delayed bladder control, and poor toilet facilities might be factors associated with the development of OAB.
Chung
Jae Min
JM
Department of Urology, Kosin University College of Medicine, Busan, Korea.
Lee
Sang Don
SD
Kang
Dong Il
DI
Kwon
Dong Deuk
DD
Kim
Kun Suk
KS
Kim
Su Yung
SY
Kim
Han Gwun
HG
Moon
Du Geon
du G
Park
Kwan Hyun
KH
Park
Yong Hoon
YH
Pai
Ki Soo
KS
Suh
Hong Jin
HJ
Lee
Jung Won
JW
Cho
Won Yeol
WY
Ha
Tae Sun
TS
Han
Sang Won
SW
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D007723:Korea; D008297:Male; D015995:Prevalence; D053201:Urinary Bladder, Overactive / Q000453:epidemiology* / Q000209:etiology*