Identification of potential associated factors for stress urinary incontinence in women: a retrospective study

Background: This study sought to analyze the potential associated factors for female stress urinary incontinence (SUI). Methods: A total of 5,013 women were screened for pelvic floor function at the West China Second Hospital of Sichuan University from January 2015 to January 2019. Of these, 410 patients were diagnosed with SUI. A single-factor Chi-square test and multi-factor logistic regression analysis were conducted to examine the relationship between pre-pregnancy urinary incontinence, vaginal delivery, menopause, and hormone therapy, chronic cough, and smoking, and postpartum SUI. Results: The postpartum SUI rate in patients with urinary incontinence during pregnancy was 19.33%, while that of patients without urinary incontinence was only 5.44%. The rates of urinary incontinence in patients experiencing vaginal delivery or cesarean delivery were 13.62% and 4.36%, respectively. The SUI incidences in patients with or without a family genetic history of SUI were 28.46% and 7.48%, respectively. The incidence rates of SUI in smoking and non-smoking patients were 18.92% and 8.39%. The rate of SUI in patients with chronic cough (16.46%) behaved significantly differently from those with non-chronic cough (8.21%). The occurrence of SUI was highly correlated with the following factors, including pre-pregnancy urinary incontinence (OR =5.256; 95% CI: 2.061-13.409; P<0.001), urological incontinence during the pregnancy period (OR =2.965; 95% CI: 2.111-4.163; P<0.001), vaginal delivery (OR =4.028; 95% CI: 2.909- 5.577; P<0.001), and genetic history (OR =4.341; 95% CI: 2.8-6.73; P<0.001). Conclusions: The occurrence of SUI is highly related to a history of urinary incontinence, the delivery mode, chronic cough, smoking, and genetic history. Further, urinary incontinence before and during pregnancy, natural delivery, and genetic history are important independent high-associated factors for SUI. Our findings show the importance of screening for the above associated factors in association with SUI.