Objective-To report the distribution of pelvic support among a population-based sample of middle-aged, community-dwelling women, as defined by pelvic organ prolapse quantification (POP-Q), and study factors that might influence POP-Q measurements.Study Design-Secondary analysis of population-based study of community-dwelling, African American and Caucasian women aged 35 to 64 years from southeastern Michigan. 394 women consented to physical examination using the POP-Q. Statistical analysis included descriptive statistics and multivariable regression. Estimates were weighted to reflect probability and nonresponse characteristics of the sample to increase generalizability of the findings.Results-Mean values for POP-Q points were: Aa and Ba = -1.2 cm, C = -6.5 cm (intact uterus), C = -6.9 cm (prior hysterectomy), and Ap and Bp = -1.8 cm. The POP-Q stages: stage 0, 8.8%; stage I, 21.4%; stage II, 67.7%; stage III, 2.1%. Increasing vaginal parity was associated with increasing descent of the anterior, apical and posterior vaginal wall (p< .001).Conclusion-In this population-based study of women from Southeastern Michigan, 90% of women had anterior and posterior vaginal wall support that was above or extended to the hymen. Increasing vaginal parity was associated with increasing descent of the anterior, posterior and vaginal apex.
Keywordsepidemiology; pelvic organ support; pelvic organ prolapse quantification system (POP-Q)