A total of 13416 questionnaires (4287 from boys and 9129 from girls) were qualified for statistical analysis The overall prevalence of OAB was 6.1% (823/13416) , of which 754 cases were mild OAB patients (91.6%) and 69 cases were moderate OAB patients (8.4%),patients without severe OAB. The prevalence OAB of the 18, 19, 20, 21, 22 and 23 age groups were 6.6%, 6.3%, 6.5%, 6.7%, 5.2% and 4.6%, respectively, and no significant difference were found between them. A total of 782 (95.0%) cases with OAB suffered from urgency, 436 (53.0%) frequency, 184 (22.4%) nocturia, 73 (16.4%) urgent urinary incontinence. The prevalence of OAB was 4.8% in boys and 6.8% in girls. The prevalence of OAB in constipation patients was 8.7%, higher than that in non-constipation patients. The prevalence of OAB in patients with anal dehiscence, anal fissure, urinary tract infection and enuresis was higher than that in other groups (P < 0.05). Multivariate and unconditional logistic regression analysis of the univariate analysis of meaningful indicators found that gender, constipation, rectal prolapse, anal fissure, history of urinary tract infection and enuresis were significantly associated with OAB. There were 9128 people with normal weight (18.5 < BMI < 24), of which 525 (5.8%) suffered from OAB, 1237 were overweight (24 < BMI < 28), 89 (7.2%) suffered from OAB, 199 were obese (BMI < 28) and 13 (6.5%) suffered from OAB, but there was no significant difference among the three groups (P > 0.05). There are 7583 people who meet the standard weight, including 447 (5.9%) with OAB, 854 with obesity (defined as 20% over standard body weight), 52 (6.5%) with OAB. Group differences were not statistically significant. Moreover, the prevalence of OAB was not related to the place of residence and age.