Baseline maternal and infant characteristics
| Variable | Burns (%) n=1556 | Matched controls (%) n=6200 | P value |
| Maternal characteristics | |||
| Age | 28.5 (6.0) | 29.6 (5.6) | <0.001 |
| Indigenous | 176 (11.3) | 258 (4.5) | <0.001 |
| Multiparous | 994 (63.9) | 3662 (59.1) | <0.001 |
| Smoked during pregnancy | 406 (26.5) | 1061 (17.5) | <0.001 |
| Vaginal delivery | 1042 (67.0) | 3790 (61.1) | <0.001 |
| Maternal diabetes | 8 (0.5) | 4 (0.6) | 0.49 |
| Gestational diabetes | 63 (4.1) | 289 (4.7) | 0.31 |
| Hypertension | 5 (0.3) | 44 (0.7) | 0.08 |
| Immigrant | 665 (42.7) | 2781 (44.9) | 0.14 |
| Rural | 534 (34.2) | 1978 (31.9) | 0.07 |
| Birth weight (g) | 3361.4 | 3381.9 | 0.15 |
| Infant characteristics | |||
| Mean gestational age (weeks) | 39 | 39 | 0.58 |
| Preterm (<37 weeks) | 124 (8.0) | 488 (7.9) | 0.92 |
| Admission into an NICU | 275 (17.7) | 1126 (18.2) | 0.66 |
NICU, neonatal intensive care unit.