We estimated the remission and transition rate between urinary incontinence (UI) subtypes in women with UI and evaluated the impact of body mass index (BMI) on this process.
A Chinese population-based longitudinal study was conducted. Women aged ≥20 years were included using a multistage, stratified, cluster sampling method. Self-reported data on demographics, medical history, and physiological and anthropometric information were collected. UI was identified using 2 questions about any leaking symptom of stress UI (SUI) and urgency UI (UUI) in the past 6 months. Predicted probabilities of UI subtypes were calculated using multinomial logistic regression.
Analyses included 5,189 women (mean age 52.6 years, mean BMI 23.8 kg/m2), of whom 98.5% were parous. The median followup time was 4.0 years. Overall, the annual remission rate of UI was 12.7% among adult women. Regarding UI subtypes, the remission rates for UUI and SUI were similar, but higher than that for mixed urinary incontinence (MUI; p <0.05). In total, 7.6% of SUI patients and 16.4% of UUI patients developed MUI, and 35.3% of MUI patients continued to report MUI after 4 years. For women aged ≥60 years with a BMI ≥24 kg/m2 and MUI at onset, the predicted remission rate (95% CI) was only 0.32 (0.29-0.35), but the predicted probability of the MUI remaining reached 0.50 (0.46-0.54).
The annual remission rate of UI was 12.7% among adult women. Women with a higher BMI had less remission and a higher predicted probability of MUI 4 years later.
The Journal of urology. 2022 Apr 15 [Epub ahead of print]
Haiyu Pang, Tao Xu, Zhaoai Li, Jian Gong, Qing Liu, Yuling Wang, Juntao Wang, Zhijun Xia, Lan Zhu
Medical Research Center, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China., Department of Epidemiology and Statistics, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and School of Basic Medicine, Peking Union Medical College, Beijing, China., Department of Gynecology and Obstetrics, Children's Hospital of Shanxi Province, Shanxi, China., Department of Gynecology and Obstetrics, Maternal and Child Health Hospital of Wuxi, Jiangsu, China., Department of Gynecology and Obstetrics, Maternal and Child Health Hospital of Gansu Province, Lanzhou, China., Department of Gynecology and Obstetrics, Maternal and Child Health Hospital of Foshan, Guangdong, China., Department of Gynecology and Obstetrics, Maternal and Child Health Hospital of Guiyang, Guizhou, China., Department of Gynecology and Obstetrics, Sheng Jing Hospital of China Medical University, Liaoning, China., Department of Gynecology and Obstetrics, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, National Clinical Research Center for Obstetric and Gynecologic Diseases, Beijing, China.