Table 1.
Baseline characteristics
| Gestational age | 29-33 wks | 34-36 wks | ≥ 37 wks | Total | |
|---|---|---|---|---|---|
| 29-41 wks | |||||
| (N = 25) | (N = 30) | (N = 63) | (N = 118) | ||
| Male gender, N (%) | 12 (48.0) | 19 (63.3) | 29 (46.0) | 60 (50.8) | |
| Cesarean delivery, N (%) | 21 (84.0) | 22 (73.3) | 25 (39.7) | 68 (57.6) | |
| Weight-for-date, N (%) | |||||
| Small | 1 (4.0) | 3 (10.0) | 0 (0.0) | 4 (3.4) | |
| Large | 1 (4.0) | 1 (3.3) | 9 (14.3) | 11 (9.3) | |
| Nursery setting, N (%) | |||||
| Normal Unit | 0 (0.0) | 24 (80.0) | 62 (98.4) | 86 (72.9) | |
| NICU | 25 (100.0) | 6 (20.0) | 1 (1.6) | 32 (27.1) | |
| Maternal anesthesia, N (%) | |||||
| Epidural | 2 (8.0) | 8 (26.7) | 41 (65.1) | 51 (43.2) | |
| General | 5 (20.0) | 2 (6.7) | 0 (0.0) | 7 (5.9) | |
| Spinal | 16 (64.0) | 20 (66.7) | 15 (23.8) | 51 (43.2) | |
| Local/None | 2 (8.0) | 0 (0.0) | 7 (11.1) | 9 (7.6) | |
| Placement, N (%) | |||||
| Crib | 10 (40) | 25 (83.3) | 61 (96.8) | 96 (81.4) | |
| Radiant warmer | 2 (8) | 2 (6.7) | 1 (1.6) | 5 (4.2) | |
| Closed isolette | 13 (52) | 3 (10) | 1 (1.6) | 17 (14.4) | |
| Resuscitation at birth, N (%) | 7 (28.0) | 0 (0.0) | 1 (1.6) | 8 (6.8) | |
| Age (Days), Median | 11.0 | 1.0 | 1.0 | 1.0 | |
| IQR | 6.0-18.0 | 1.0-1.0 | 1.0-1.0 | 1.0-2.3 | |
| Birth weight (Grams), Median | 1765.0 | 2595.0 | 3305.0 | 2980.0 | |
| IQR | 1482.0-2185.0 | 2263.8-2761.3 | 3065.0-3635.0 | 2321.3-3363.8 | |
| Birth length, Median | 42.0 | 47.0 | 50.0 | 48.0 | |
| IQR | 40.3-45.0 | 45.0-48.5 | 48.5-51.0 | 45.0-50.0 | |
| Birth head circumference, Median | 30.0 | 33.0 | 35.0 | 33.5 | |
| IQR | 27.3-32.0 | 32.9-34.0 | 34.0-35.5 | 32.5-35.0 | |
| Crib score, Range | 0-6 | 0-1 | 0 | 0-6 | |
| Axillary temperature (°C), Mean ± SD | 36.8 (0.3) | 36.8 (0.3) | 36.9 (0.4) | 36.8 (0.4) | |
| Range | 36-37.4 | 35.9-37.4 | 35.8-37.8 | 35.8-37.8 | |
| Rectal temperature (°C), Mean ± SD | 36.6 (0.4) | 36.6 (0.6) | 36.9 (0.5) | 36.8 (0.5) | |
| Range | 35.9-37.3 | 34.6-37.2 | 35.5-37.7 | 34.6-37.7 | |
| Paired t-test | |||||
| Comparison of axillary and rectal temperatures | p value | 0.22 | 0.01 | 0.55 | 0.10 |
| Pearson Correlation | |||||
| r (p value) | 0.2 (0.30) | 0.4 (0.05) | 0.6 (0.000) | 0.5 (0.000) | |