Abstract:Objective To investigate the risk factors associated with stress urinary incontinence (SUI) in patients with vaginal laxity syndrome (VLS).Methods In this study, the relevant variables of 452 VLS patients with SUI (observation group) and 415 VLS patients without SUI (control group) admitted to the outpatient and inpatient departments of Pelvic floor Reconstruction Department of the Third Affiliated Hospital of Zhengzhou University from May 2021 to May 2023 were analyzed. Univariate and multifactorial general Logistic regression analysis were used to explore the risk factors for SUI in VLS patients.Results The relevant parameters of pelvic floor pressure in the control group and the observation group (including the average value of the pre-resting stage, the maximum value of the rapid contraction stage, the relaxation time of the rapid contraction stage, the average value of the relaxation time of the tension contraction stage, the average value of the endurance contraction stage, and the average value of the post-resting stage), and the relevant parameters of the determination of the pelvic floor muscle strength (including the classification of the deep I muscle, the classification of the deep Ⅱ muscle, and the shallow one) There was no statistically significant difference between layer-I muscle classification, superficial class Ⅱ muscle classification, posterior vaginal wall swelling, uterine prolapsis, pelvic floor myofascitis and perineal laceration (P > 0.05). There were statistically significant differences between control group and observation group in age, frequency of couvade, frequency of couvade, BMI and presence or absence of anterior vaginal wall swelling (P < 0.05). Multivariate logistic regression analysis showed that older age [O^R =1.023 (95%CI: 1.005, 1.041)], first couvade [O^R =2.205 (95%CI: 1.286, 3.781)], multiple couvade [O^R =2.472 (95%CI: 1.372, 4.455)], high BMI [O^R =1.125 (95% CI: 1.071, 1.183)] and anterior vaginal wall bulge [O^R =11.050 (95% CI: 2.338, 52.225)] was a risk factor for SUI in VLS patients, and the differences were statistically significant (P < 0.05).Conclusions Advanced age, mode of delivery, number of vaginal deliveries, higher BMI, and anterior vaginal wall prolapse are independent risk factors for SUI in VRS patients. Early prevention and identification of these risk factors are critical to reducing the risk of SUI in VRS patients. These findings provide valuable insights for clinical intervention and the selection of appropriate treatment strategies.