The abovementioned significant factors were included in the binary logistic regression model, which revealed that the risk factors for OAB in children include eczema (OR = 7.299, 95% CI: 5.649–9.524, P < 0.001); urticaria (OR = 1.613, 95% CI: 1.091–2.387, P = 0.017); allergic cough or allergic rhinitis (OR = 3.484, 95% CI: 2.445–4.950, P < 0.001); skin pruritus, including frequent eye rubbing action (OR = 7.194, 95% CI: 5.376–9.524, P < 0.001); constipation (OR = 4.016, 95% CI: 2.500–6.452, P < 0.001); and blood IgE (OR = 3.785, 95% CI: 2.920–4.906, P < 0.001; see Table 2). This evidence concerns the gene IGHE and urticaria.