Table 1 Clinical and demographic characteristics of the study population
|  | Term delivery (n = 72) | Spontaneous preterm delivery (n = 18) | P value |
|---|---|---|---|
Age (years) | 24 (21.8-28) | 21 (20–26) | 0.1 |
Race: | Â | Â | Â |
  African American | 62 (86.1%) | 17 (94.4%) | 0.7 |
  White | 4 (5.6%) | 1 (5.6%) |  |
  Others | 6 (8.3%) | 0 |  |
Pre-pregnancy BMI (kg/m2) | 28.7 (25.7-35.3)* | 25.7 (21.6-33.6)** | 0.2 |
Nulliparity | 18 (25%) | 7 (38.9%) | 0.3 |
Gestational age at delivery (weeks) | 39.6 (38.8-40.7) | 30.5 (28–33.1) | 0.001 |
Birthweight (grams) | 3295 (3124.3-3538.8) | 1402.5 (997.5-1998.8) | 0.001 |
Apgar score at 1 min | 9 (8–9) | 6 (3–8) | 0.001 |
Apgar score at 5 min | 9 (9–9) | 8 (6–8) | 0.001 |
Duration of hospital stay (neonates); in days | 3 (3–3)** | 26 (13–53)*** | 0.001 |