Table 1 Baseline characteristics of each BMI group.
From: The association of low body mass index with neonatal morbidities in preterm infants
Normal-BMI group n = 2041 | Low-BMI group n = 467 | P-value | High-BMI group n = 607 | P-value | |
|---|---|---|---|---|---|
Maternal age (years) | 32.8 ± 4.5 | 33.4 ± 4.5 | 0.16 | 32.9 ± 4.4 | 0.83 |
Gestational diabetes | 179 (8.8) | 33 (7.1) | 0.27 | 56 (9.2) | 0.75 |
Preeclampsia | 274 (13.4) | 222 (47.5) | < 0.001 | 42 (6.9) | < 0.001 |
Histologic chorioamnionitis | 931 (47.3) | 123 (30.1) | < 0.001 | 265 (52.6) | 0.04 |
Antenatal steroids | 1005 (60.1) | 244 (64.0) | 0.32 | 270 (57.2) | 0.59 |
Caesarean section | 1383 (67.8) | 392 (83.9) | < 0.001 | 388 (63.9) | 0.09 |
Male gender | 1079 (52.9) | 241 (51.6) | 0.64 | 313 (51.6) | 0.58 |
Gestational age (weeks) | 27.0 ± 2.9 | 27.1 ± 2.8 | 0.52 | 26.9 ± 3.3 | 0.19 |
Birth weight (g) | 1028 ± 233 | 762 ± 229 | < 0.001 | 1129 ± 211 | < 0.001 |
Birth weight z-score | 0.22 ± 0.71 | -1.07 ± 0.85 | < 0.001 | 0.83 ± 0.65 | < 0.001 |
Birth length (cm) | 36.0 ± 3.1 | 34.1 ± 4.2 | < 0.001 | 34.7 ± 3.0 | < 0.001 |
Birth length z-score | 0.28 ± 0.98 | -0.46 ± 1.62 | < 0.001 | -0.22 ± 0.99 | < 0.001 |
BMI at birth | 7.81 ± 0.69 | 6.38 ± 0.69 | < 0.001 | 9.37 ± 1.39 | < 0.001 |
