Table 2.
Obstetric outcomes for three randomization groups. Unless otherwise stated n (%) are shown
| No sweep (n = 116) | Once-weekly sweep (n = 117) | Twice-weekly sweeps (n = 117) | Pvalue | |
|---|---|---|---|---|
| GA on admission† | 40.6 (39.9–41.0) [38.7–41.7] | 40.4 (39.9–41.0) [38.7–41.7] | 40.2 (40.7–39.7) [39.0–41.7] | 0.009 |
| Recruitment–admission interval (days)† | 11 (6–14) [0–19] | 10 (6–14) [0–18] | 8 (5–12) [0–19] | 0.018 |
| Bishop’s score on admission† | 7 (4–10) [1–13] | 7 (6–14) [1–12] | 8 (5–12) [1–13] | 0.010 |
| Bishop’s score | ||||
| 0–4 | 33 (28.4) | 13 (11.1) | 10 (8.5) | <0.001 |
| 5–9 | 54 (46.6) | 77 (65.8) | 77 (65.8) | |
| 10–13 | 29 (25.0) | 27 (23.1) | 30 (25.6) | |
| Remaining undelivered at 41 weeks and admitted for labor induction | 40 (34.5) | 32 (27.4) | 27 (23.1) | 0.149 |
| Admission to delivery interval (hours)‡ | 12.2 (7.3–20.0) | 11.5 (6.1–16.8) | 11.0 (6.4–18.3) | 0.114 |
| Mode of delivery | ||||
| Vaginal delivery** | 83 (71.6) | 89 (76.1) | 87 (74.4) | 0.730 |
| Cesarean delivery | 33 (28.4) | 28 (23.9) | 30 (25.6) | |
| Reasons for cesarean delivery | ||||
| Fetal labor intolerance | 9 (27.3) | 11 (39.3) | 13 (43.3) | 0.520 |
| CPD/FTP | 20 (60.6) | 17 (60.7) | 15 (50.0) | |
| Failed induction | 3 (9.1) | – | 1 (3.3) | |
| Malpresentation | 1 (3.0) | – | 1 (3.3) | |
| Chorioamnionitis at delivery | 12 (10.3) | 7 (6.0) | 9 (7.7) | 0.466 |
| GBS on vaginal swab | 21 (18.1) | 25 (21.4) | 30 (25.6) | 0.375 |
| Birth weight† (gm) | ||||
| < 2,500 | 3,507 (3,304–3,818) [1,845–4,750] | 3,578 (3,225–3,913) [2,245–4,670] | 3,530 (3,263–3,825) [2,615–4,610] | 0.903 |
| Apgar score < 7 | ||||
| 1 minute | 10 (8.6) | 8 (6.8) | 8 (6.8) | 0.836 |
| 5 minutes | – | – | 2 (1.7) | 0.331 |
| Umbilical artery pH† | 7.28 (7.23–7.30) [7.06–7.41] | 7.29 (7.26–7.32) [7.05–7.45] | 7.29 (7.26–7.31) [7.09–7.43] | 0.027 |
| < 7.21 | 17 (14.7) | 14 (12.0) | 14 (12.0) | 0.779 |
| < 7.10 | 1 (0.9) | 2 (1.7) | 1 (0.9) | 0.999 |
| NICU admission | 4 (3.4) | 2 (1.7) | 2 (1.7) | 0.609 |
Notes:
†
Median, interquartile range (first–third quartile), and range [minimum–maximum] are shown;
‡
interval between admission and delivery was estimated using Kaplan–Meier survival probabilities and with all cesarean deliveries censored;
**
vaginal deliveries include nine assisted vaginal deliveries, n = 5, n = 3, and n = 1 for control, one sweep per week, and two sweeps per week, respectively.
Abbreviations: GA, gestational age; GBS, group B Streptococcus; CPD, cephalopelvic disproportion; FTP, failure to progress; NICU, neonatal intensive care unit; n, number.