Table 2.
Intrapartum characteristics
| SGA N = 816 |
AGA N = 7,887 |
P | |
|---|---|---|---|
| Gestational age (weeks) | 39.1 ± 1.1 | 39.4 ± 1.2 | <0.001 |
| Gestational hypertension / preeclampsia | 113 (13.9%) | 755 (9.6%) | < 0.001 |
| Magnesium sulfate treatment | 52 (6.4) | 255 (3.2) | <0.001 |
| Labor Spontaneous Spontaneous, augmented Induced |
74 (9.1) 237 (29.0) 505 (61.9) |
659 (8.4) 2,620 (33.2) 4,608 (58.4) |
0.05 |
| Abruption | 13 (1.6) | 85 (1.1) | 0.18 |
| Anesthesia Regional only General (alone or following regional) None |
772 (94.6) 6 (0.7) 38 (4.7) |
7,363 (93.4) 43 (0.6) 481 (6.1) |
0.20 |
| Tracing in last hour before delivery (mins) 30-39 40-49 50-60 |
69 (8.5) 57 (7.0) 690 (84.6) |
577 (7.3) 430 (5.5) 6,880 (87.2) |
0.08 |
| Reached second stage of labor | 723 (88.6) | 7,289 (92.5) | <0.001 |
| Route of delivery Vaginal Cesarean |
718 (88.0) 98 (12.0) |
7,160 (90.8) 727 (9.2) |
0.01 |
| Cesarean indication *
Fetal indications‡ Dystocia/CPD/arrest Other |
57 (7.0) 40 (4.9) 1 (0.1) |
312 (4.0) 396 (5.0) 19 (0.2) |
<0.001 |
| ST-segment analysis (open group) | 423 (51.8) | 3,877 (49.2) | 0.14 |
Data presented as N (%) or mean ± standard deviation
SGA, small for gestational age (birthweight < 10th percentile for gestational age); AGA, appropriate for gestational age (birthweight 10-90th percentile for gestational age)
*
Percentages are of all deliveries
‡
Fetal indication was determined according to fetal electrocardiographic ST-segment analysis guidelines in the open group and according to local protocol and ACOG guidelines (reference #1) for fetal heart-rate monitoring in the masked group.