The Impact of Abdominal Circumference on Urodynamic Parameters in Female Patients with Stress Urinary Incontinence

Objective To analyze from a urodynamic perspective, clarify the value of abdominal circumference (AC) compared with body mass index (BMI) in the risk assessment of female stress urinary incontinence (SUI), and provide evidence for the mechanism of SUI induced by abdominal obesity. Methods A total of 106 female patients clinically diagnosed with SUI who underwent air pressure urodynamic examination at the Hospital between September 2023 and January 2025 were enrolled. The influence of AC on the urodynamic parameters of SUI patients was analyzed and compared. Results Linear regression analysis showed that for each 1 cm increase in AC, intra-abdominal pressure (Pabd) increased by 0.095 cm H₂O and intravesical pressure (Pves) increased by 0.054 cm H₂O. At maximum cystometric capacity (MCC), each 1 cm increase in AC led to a 0.274 cm H₂O rise in Pabd and a 0.542 cm H₂O elevation in Pves. The initial urge volume was only negatively correlated with AC (r=-0.238, P=0.018) and showed no correlation with BMI (P=0.214). Conclusion This study confirms the impact of AC on urodynamic parameters in women with SUI, enabling more accurate prediction of SUI risk in females. Clinically, AC should be incorporated into the early assessment system for SUI patients.