From: Rectal–vaginal pressure gradient in patients with pelvic organ prolapse and symptomatic rectocele
| Anterior vaginal prolapse | Apical prolapse | Posterior vaginal prolapse | |
|---|---|---|---|
| I | 23 (10.6%) | 31 (14.3%) | – |
| II | 71 (32.7%) | 69 (31.8%) | – |
| III | 102 (41.0%) | 98 (45.2%) | 190 (87.6%) |
| IV | 21 (9.7%) | 19 (8.8%) | 27 (12.4%) |