TABLE 3.
Characteristics of singleton term infants and placentas of pregnancies randomly selected for vitamin D assessment from the eligible cohort, the Collaborative Perinatal Project (1959–1966)1
| Male (n = 1017) | Female (n = 1031) | |
| Gestational age (wk)2 | 39.6 ± 1.2 | 39.7 ± 1.3 |
| Birth weight (g)2 | 3234 ± 396 | 3139 ± 424 |
| Length (cm)2 | 50.3 ± 2.2 | 49.8 ± 2.4 |
| Placental weight (g) | 439 ± 91 | 436 ± 87 |
1
All values are means ± SDs. n = 2048 pregnancies; n = 2030 women (18 women with one repeated pregnancy).
2
P < 0.05 for difference by using the t test or Kruskal-Wallis test.