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Associations Between Risk Factors and Overactive Bladder: A Meta-analysis.

OBJECTIVE: The purpose of this study was to investigate the risk factors of overactive bladder (OAB).

METHODS: The PubMed, Embase, and Cochrane Library databases were retrieved through May 2016. Odds ratios (OR) or standard mean differences (SMDs) with 95% confidence intervals (CIs) were used to evaluate the associations between risk factors and OAB. Heterogeneity among studies was examined using χ test based on the Q and I tests.

RESULTS: A total of 28 articles were analyzed in our study. The results suggested that age and body mass index were significantly higher in OAB patients than in non-OAB controls (SMDs [95% CIs], 0.30 [0.19-0.41] and 0.39 [0.24-0.53]). A significant negative association was found between employment status and OAB (OR [95% CIs], 0.64 [0.46-0.90]). However, sex, educational level, parity, vaginal delivery, race, menopause, marital status, smoking, and alcohol consumption were not significantly different in OAB and non-OAB control patients (ORs [95% CIs], 0.95 [0.59-1.55], 1.04 [0.82, 1.33], 0.98 [0.56-1.70], 1.66 [0.90-3.07], 0.98 [0.75-1.28], 1.84 [0.23-14.70], 0.97 [0.78-1.19], 0.91 [0.77-1.08], and 0.88 [0.71-1.09], respectively). In addition, the number of parities and vaginal deliveries in OAB patients also showed no significant differences compared with non-OAB control patients (SMDs [95% CI], 0.05 [-0.27 to 0.38] and -0.16 [0.40 to 0.09]).

CONCLUSIONS: This meta-analysis suggests that age and body mass index are associated with increased risks of OAB, whereas employment status is associated with a decreased risk of OAB. Further prospective studies with large sample sizes are needed to confirm this conclusion.This is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License 4.0 (CCBY-NC-ND), where it is permissible to download and share the work provided it is properly cited. The work cannot be changed in any way or used commercially without permission from the journal.

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