Table 1.
Maternal and child characteristics
| Generation R Study | INMA | |
|---|---|---|
| n = 910 | n = 376 | |
| Maternal characteristics | ||
| Age, years | 31.5 ± 4.1 | 30.4 ± 4.1 |
| Pre-pregnancy body mass index, kg/m2 | 23.2 ± 3.8 | 23.8 ± 4.5 |
| Gestational age at serum ferritin measurement, weeks | 12.8 (9.9, 17.0) | 13.2 (11.0, 17.2) |
| Education, higher | 597 (65.6) | 115 (30.6) |
| Continued smoking during pregnancy | 114 (12.5) | 110 (29.3) |
| Serum ferritin, µg/L | 61.8 (13.0, 208.2) | 27.8 (5.1, 106.2) |
| Iron deficiency (ferritin < 15 µg/L) | 31 (3.4) | 86 (22.9) |
| Iron overload (ferritin > 150 µg/L) | 85 (9.3) | 2 (0.5) |
| Child characteristics | ||
| Sex, male | 445 (48.9) | 193 (51.3) |
| Gestational age at birth, weeks | 40.4 (36.7, 42.3) | 39.9 (36.9, 42.0) |
| Birth weight, grams | 3552 ± 505 | 3272 ± 419 |
Values are means ± SD, medians (95% range) or numbers of subjects (valid %)