Table 3.
Baseline characteristics of study population by HFE genotype and TF genotype.
|
HFE genotype
|
TF genotype
|
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| All
|
Wild type
|
Variant
|
Wild type
|
Variant
|
||||||
| Characteristic | No.a | Mean ± SD | No. | Mean ± SD | No. | Mean ± SD | No. | Mean ± SD | No. | Mean ± SD |
| Gestational age (weeks) | 413 | 39.2 ± 1.5 | 329 | 39.2 ± 1.5 | 84 | 39.1 ± 1.4 | 337 | 39.2 ± 1.5 | 78 | 39.0 ± 1.6 |
| Sex (% female) | 414 | 44 | 330 | 46 | 84 | 36 | 338 | 43 | 78 | 54 |
| Cord blood lead (μg/dL) | 364 | 6.6 ± 3.7 | 289 | 6.6 ± 3.5 | 75 | 6.9 ± 4.2 | 296 | 6.7 ± 3.7 | 69 | 6.5 ± 3.8 |
| Birth weight (g) | 415 | 3,149 ± 409 | 331 | 3,164 ± 402 | 84 | 3,087 ± 433 | 338 | 3,147 ± 419 | 79 | 3,139 ± 369 |
| Birth length (cm) | 411 | 50.5 ± 2.3 | 327 | 50.4 ± 2.3 | 84 | 50.5 ± 2.1 | 335 | 50.5 ± 2.3 | 78 | 50.2 ± 2.1 |
| Head circumference (cm) | 399 | 33.9 ± 1.5 | 315 | 34.0 ± 1.5 | 84 | 33.7 ± 1.5 | 324 | 33.9 ± 1.5 | 77 | 33.9 ± 1.5 |
a
Because of missing data, numbers do not equal 422.