Table 6

Results of logistic regression for risk of re-operation for POP repair

Risk factorPOP operationUnadjusted
One (N=1270)>1 (N=238)OR (95% CI)p Value
Mode of delivery
 SVD only857 (67.5%)164 (68.9%)1.00
 CS only7 (0.6%)0 (0%)
 At least one forceps365 (28.7%)65 (27.3%)0.93 (0.68 to 1.27)0.65
 At least one instrumental, but no forceps15 (1.2%)1 (0.4%)0.35 (0.05 to 2.66)0.31
 SVD+CS26 (2.0%)8 (3.4%)1.61 (0.72 to 3.61)0.25
Age at first delivery
 Under 20 years174 (13.7%)47 (19.7%)1.44 (1.00 to 2.06)0.049
 20–29 years926 (72.9%)174 (73.1%)1.00
 30–49 years170 (13.4%)17 (7.1%)0.53 (0.31 to 0.90)0.018
Total number of deliveries
 One246 (19.4%)39 (16.4%)1.00
 2–4978 (77.0%)193 (81.1%)1.25 (0.86 to 1.81)0.25
 5+46 (3.6%)6 (2.5%)0.82 (0.33 to 2.06)0.68
Occurrence of twins
 No1254 (98.7%)235 (98.7%)1.00
 Yes16 (1.3%)3 (1.3%)1.00 (0.29 to 3.46)0.99
Time between deliveries
 One delivery246 (19.4%)39 (16.4%)1.00
 All <2 years167 (13.1%)29 (12.2%)1.10 (0.65 to 1.84)0.73
 All ≥2 years608 (47.9%)119 (50.0%)1.24 (0.84 to 1.83)0.29
 Mixture249 (19.6%)51 (21.4%)1.29 (0.82 to 2.03)0.27
Type of perineal wound
 No wound442 (34.8%)85 (35.7%)1.00
 All episiotomy361 (28.4%)51 (21.4%)0.74 (0.51 to 1.07)0.11
 At least one third-degree tear5 (0.4%)1 (0.4%)1.04 (0.12 to 9.01)0.97
 No perineal tears (lacerations only)462 (36.4%)101 (42.4%)1.14 (0.83 to 1.56)0.43
  • CS, caesarean section; POP, pelvic organ prolapse; SVD, spontaneous vaginal delivery.