TABLE 1

Demographic Variables and BPD

VariableBPD, n = 33No BPD, n = 114Statistics
Gestational age, wk, mean (SD)26.8 (1.6)29.3 (1.8)−2.5 (−3.2 to −1.8) P < .001a
Birth weight, g, mean (SD)909 (176)1150 (221)−241 (−324 to −158) P < .001a
Birth weight SD score, mean (SD)−0.46 (0.89)−0.79 (1.01)0.33 (−0.05 to 0.72) P = .09a
Male, n19 (57.6%)51 (44.7%)χ2 = 1.7; P = .19
Antenatal steroids, n14 (42.4%)64 (56.1%)χ2 = 1.9; P = .16
Age assessed, y19.4 (1.3)18.8 (1.1)0.6 (0.1 to 1.0) P = .01
Active smoking at 18, n6 (18.2%)43 (37.7%)χ2 = 4.4; P = .036
Asthma at 18, n8 (24.2%)25 (21.9%)χ2 = 0.08; P = .78
Weight SD score at 180.07 (1.28)0.12 (1.38)−0.05 (−0.58 to 0.48)aP = .86
Height SD score at 18−0.48 (0.97)−0.35 (1.17)−0.13 (−0.57 to 0.31)aP = .55
  • a Mean difference (95% CI).