TABLE 1.
Characteristics of the study population
| Characteristic | Normative (n=198) | Clinical nonmedical (n=91) | Clinical medical (n=83) | P* |
|---|---|---|---|---|
| Parent | ||||
| Maternal age, years | 34.09±5.52 | 32.98±5.31 | 32.90±5.17 | 0.127 |
| Paternal age, years | 36.38±5.94 | 37.24±6.83 | 36.47±5.65 | 0.538 |
| Maternal education, years | 15.01±2.56 | 14.28±2.77 | 14.26±2.52 | 0.029 |
| Paternal education, years | 14.83±2.68 | 14.85±2.68 | 14.10±2.75 | 0.109 |
| Child | ||||
| Age, months | 31.16±19.62 | 24.64±15.92 | 26.93±17.31 | 0.013 |
| Gestational age, weeks | 38.96±2.27 | 39.03±1.57 | 37.21±3.79 | 0.000 |
| Birth weight, g | 3359±609 | 3130±547 | 2832±917 | 0.000 |
| Boys, n (%) | 92 (46) | 48 (53) | 50 (61) | 0.082 |
| First born, n (%) | 91 (47) | 61 (67) | 37 (46) | 0.005 |
Data presented as mean ± SD unless otherwise indicated.
*
One-way ANOVAs for continuous variables and Pearson’s χ2 for categorical variables