Table 1.
No. | Ratio of event per 100 live-born infants | |
---|---|---|
Miscarriage |
36 |
3.1 |
Stillbirth |
30 |
2.6 |
# of live-born infants with birth records |
N = 1132 |
Ratea(95% CI) |
Neonatal mortality (0–28 days) |
47 |
0.043 (0.032–0.057) |
Early mortality (0–70 days) |
67 |
0.063 (0.050–0.079) |
Birth Weightb |
|
Percentage |
<1500 g |
15 |
1.3 |
1500–1999 g |
33 |
2.9 |
2000–2499 g |
113 |
10.1 |
≥2500 g |
963 |
85.7 |
Mean ± SD, g |
2947.7 ± 531.7 |
|
Gestationc |
|
|
<32 weeks |
94 |
8.4 |
32–33 weeks |
88 |
7.9 |
34–36 weeks |
260 |
23.3 |
≥37 weeks |
672 |
60.3 |
Mean ± SD, weeks | 37.6 ± 4.05 |
a Calculated using Kaplan-Meier life table methods.
b 8 infants are missing data on birth weight and weight at 1 week visit.
c 18 infants are missing data on gestational weeks estimated at enrollment. Data suggested a systematic underestimation of gestation by 2–3 weeks. Thus we estimate that only 16.3% of births were preterm by conventional definitions of <37 weeks.