Table 4.
Characteristics of live births
| Characteristic, n (%) | Live births (N = 272)a |
|---|---|
| Sexb | |
| Female | 137 (50.9) |
| Male | 132 (49.1) |
| Gestational age at birth, yearsb | |
| Mean (SD) | 38.3 (3.0) |
| Median (range) | 38.9 (23–47) |
| Birth weight, gc | |
| Mean (SD) | 3169 (689) |
| Median (range) | 3260 (530–4848) |
| Birth length, cmd | |
| Mean (SD) | 49.2 (4.4) |
| Median (range) | 50.1 (17–57) |
| Head circumference, cme | |
| Mean (SD) | 33.7 (2.8) |
| Median (range) | 34.0 (13–40) |
| Apgar score, 1 minf | |
| Mean (SD) | 8.0 (1.6) |
| Median (range) | 8.0 (1–10) |
| Apgar score, 5 ming | |
| Mean (SD) | 8.8 (1.0) |
| Median (range) | 9.0 (2–10) |
| Characteristics in singleton births without geneticist-confirmed birth defects (n = 246) | |
| Gestational age, n (%)h | |
| Full term (≥ 36 weeks gestation) | 223 (91.8) |
| Preterm (< 36 weeks gestation) | 11 (4.5) |
| Very preterm (< 32 weeks gestation) | 9 (3.7) |
| Birth weight, n (%)i | |
| Normal | 205 (91.9) |
| Low (< 2500 g) | 11 (4.9) |
| Very low (< 1500 g) | 7 (3.1) |
SD standard deviation
aIncludes four sets of twins
bn = 269
cn = 249
dn = 224
en = 196
fn = 206
gn = 205
hn = 243
in = 223