4.2 Article

Risk factors and prevalence of urinary incontinence in mid-life Singaporean women: the Integrated Women's Health Program

Journal

INTERNATIONAL UROGYNECOLOGY JOURNAL
Volume 31, Issue 9, Pages 1829-1837

Publisher

SPRINGER LONDON LTD
DOI: 10.1007/s00192-019-04132-3

Keywords

Urinary incontinence; Prevalence; Midlife; Asian women; Risk factors; Urinary distress inventory 6 (UDI-6)

Funding

  1. Singapore National Medical Research Council [CSASI16May007]
  2. Obstetrics and Gynecology Pitch for Fund Research Grant (OG PFFR FY 2014) from the Department of Obstetrics and Gynecology, National University of Singapore

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Introduction and hypothesis The objective was to identify the prevalence and risk factors for urinary incontinence (UI) in healthy midlife Singaporean women. Methods Healthy women, aged 45-69 years, were assessed for UI and sociodemographic characteristics, including ethnicity, menopausal status, parity, and body mass index (BMI). UI subtypes corresponding to stress (SUI) alone, urge (UUI) alone, mixed (MUI), and leakage (drops only) incontinence were classified using the Urinary Distress Inventory 6 (UDI-6). Risk factors were examined using Chi-squared tests, followed by sequential multivariate logistic regression to estimate adjusted odds ratios (aOR and 95% confidence intervals). Results A total of 1,119 women (mean age 56.2 +/- 5.2) completed the UDI-6. 52.3% reported any UI; MUI and SUI were the most common, each affecting 20% of women. Post-menopausal women had a lower risk (aOR 0.5 [0.3-0.9]) of SUI, but a higher risk (aOR 4.4 [1.0-19.9]) of UUI compared with premenopausal women. Higher education was negatively associated (aOR 0.3 [0.2-0.7]) with UUI, but positively associated with MUI (aOR 2.3 [1.3-4.0]). Parity (1-2 children) increased the risk of SUI (aOR 1.8 [1.0-3.1]), but reduced the risk of UUI (aOR 0.4 [0.2-0.9]). Obesity was associated with increased risk for MUI (aOR 2.2 [1.4-3.4]) and leakage (aOR 2.0 [1.0-4.1]). Malays and Indians had a higher risk of MUI, having (aOR 2.1 (1.2-3.7) and 1.7 (1.1-2.7) respectively compared with Chinese, a difference mediated by higher BMI. Conclusion Urinary incontinence is a major morbidity prevalent in healthy midlife Asian women. Post-menopausal status, education level, parity, BMI (and its link with ethnicity) are independent risk factors in this population, and should be incorporated into counseling and targeted interventions.

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