Impact of childbirth mode and interaction of multiple factors on pelvic floor function: a comprehensive analysis of postpartum muscle strength indicators.

Purpose: Based on electrophysiological assessment data of pelvic floor muscles from 1,781 women, this study systematically analyzes the association patterns among obstetric history, anthropometric indicators, and pelvic floor function through hierarchical regression modeling, aiming to provide a novel perspective for precise risk assessment. Methods: A retrospective analysis was conducted on data from 1,781 adult women, including age, height, weight, BMI, childbirth history, and pelvic floor screening results. Participants were grouped based on pelvic floor screening scores (above or below 80) and childbirth method (vaginal childbirth or cesarean section). Multiple linear regression was used to analyze risk factors for pelvic floor dysfunction, while Results: Patients were divided into two groups based on pelvic floor screening scores (≥80 and <80). There were statistically significant differences between the <80 group and ≥80 group in age, weight, and BMI (age: 38.73 ± 9.95 years vs. 37.03 ± 8.27 years, weight: 57.26 ± 16.63 kg vs. 55.69 ± 7.22 kg, BMI: 22.67 ± 6.72 vs. 21.88 ± 2.56 kg/m², all Conclusion: Multiple deliveries and longer inter-delivery intervals cumulatively impair pelvic floor function. Individualized rehabilitation should prioritize women with shorter stature, older age, or multiple births, alongside promoting a healthy BMI rather than weight loss alone. Postpartum training should be mode-tailored: activating after vaginal birth, relaxing after cesarean.