Table 1.
Characteristics of Cases and Controls
| Characteristic | Cases (n = 175) | Controls (n = 226) | Cases versus controls, p-value | Diabetes versus no diabetes (data not shown), p-value |
|---|---|---|---|---|
| Diabetes in pregnancy (%) | 14.9 | 6.2 | 0.004a | — |
| Cesarean delivery (%) | 37.1 | 25.2 | 0.01a | 0.03 |
| Preterm delivery (%)b | 11.6 | 6.8 | 0.10a | 0.41 |
| Polycystic ovary syndrome (%) | 8.0 | 4.4 | 0.13a | 0.13c |
| History of hypothyroidism (%) | 5.1 | 5.3 | 0.94a | 0.29c |
| History of infertility (%) | 11.4 | 5.8 | 0.04a | 0.06c |
| Postpartum day of visit encounter (mean ± SD) | 25.1 ± 18.9 | 23.2 ± 17.1 | 0.29d | 0.43 |
| Maternal age, years (mean ± SD) | 30 ± 5.6 | 30 ± 4.8 | 0.8d | 0.41 |
a
p-Value from chi-square statistic.
b
Two cases and four controls missing preterm status.
c
p-Value from Fisher's exact test.
d
p-Value from Student's t test.
SD, standard deviation.