Table 4.
Risk of Failed VBAC in patients with a Prior Cesarean for CPD, Failed Induction, or NRFS
| Lower Birth Weight n = 1757 |
RR (95% CI) |
Adjusted OR (95% CI) |
Same Birth Weight (Reference) n = 576 |
Higher Birth Weight n = 1645 |
RR (95% CI) |
Adjusted OR (95% CI) |
||
|---|---|---|---|---|---|---|---|---|
|
Prior
Cesarean for CPD, Failed Induction, or NRFS (n=3984) |
Failed VBAC (%) | 534 (30.4) |
0.8 (0.7-0.9) |
0.7† (0.6-0.8) |
223 (38.7) |
693 (42.1) |
1.1 (1.0-1.2) |
1.2† (1.0-1.5) |
| Uterine Rupture (%) |
19 (1.1) |
0.9 (0.4-2.1) |
- | 7 (1.2) |
19 (1.1) |
1.0 (0.4-2.3) |
- | |
| Blood transfusion (%) |
11 (0.6) |
1.2 (0.3-4.3) |
- | 3 (0.5) |
15 (0.9) |
1.8 (0.5-6.0) |
- | |
| Post-partum fever (%) |
180 (10.2) |
0.7 (0.5-0.8) |
0.6‡ (0.5-0.8) |
88 (15.3) |
210 (12.8) |
0.8 (0.7-1.1) |
0.8‡ (0.6-1.1) |
|
| Composite Complications* (%) |
46 (2.6) |
0.7 (0.4-1.2) |
0.7§ (0.4-1.2) |
21 (3.6) |
56 (3.4) |
0.9 (0.6-1.5) |
1.0§ (0.6-1.6) |
*
Includes uterine rupture, bladder injury, uterine artery laceration, and bowel injury
†
Adjusted for prior vaginal delivery, black race and labor induction
‡
Adjusted for prior vaginal delivery and black race
§
Adjusted for prior vaginal delivery
-
Unable to perform calculation either due to small number of cases or reference group of 0