Table 1 Demographics of study population and case subgroups, mean (SD)
From: Association of preeclampsia with infant APOL1 genotype in African Americans
Controls | All cases | Case Term | Cases Preterm | Cases Term NOS | Cases Term severe | ||
|---|---|---|---|---|---|---|---|
n = 282 | n = 395 | P* | n = 204 | n = 191 | n = 58 | n = 146 | |
Maternal age, year | 21.7 (4.4) | 23.6 (5.5) | <0.001 | 23.4 (5.7) | 23.9 (5.4) | 23.6 (4.9) | 23.3 (6.0) |
Gravidity (median) | 1 | 2 | <0.001 | 2 | 2 | 2 | 2 |
Gestational age, week | 39.4 (1.2) | 36.4 (3.5) | <0.001 | 38.9 (1.2) | 33.7 (3.2) | 39.1 (1.2) | 38.8 (1.2) |
Birth weight, g | 3146 (516) | 2548 (762) | <0.001 | 2997 (525) | 2008 (642) | 3052 (474) | 2977 (543) |
Fetal/placental weight | 7.7 (4.8) | 6.6 (1.3) | 0.001 | 7.0 (1.2) | 6.0 (1.2) | 6.8 (1.0) | 7.1 (1.2) |
Placental weight, g | 451 (201) | 385 (119) | <0.001 | 437 (91) | 329 (121) | 455 (78) | 430 (95) |