Table 1

Details of the infants

Cystic fibrosis infantsHealthy infantsCystic fibrosis-healthy infants#
Subjects n4795
Males %19 (40)50 (53)−12.2% (−27–7.7)
Whites %46 (98)95 (100)−2.1% (−10.7–7.5)
Maternal smoking %13 (28)27 (28)−0.7% (−14–13)
Gestational age weeks39.0 (2.0)40.0 (1.4)−1.0 (−1.7–−0.4)*
Birth weight kg3.09 (0.56)3.36 (0.42)−0.27 (−0.45–−0.08)*
Birth weight SD score−0.35 (1.2)−0.25 (0.78)−0.17 (−0.43–0.24)
Age at test weeks29.6 (6–93)29.6 (3–100)p=0.995
Weight kg6.88 (2.03)8.00 (2.05)−1.12 (−1.84–−0.40)*
Weight SD score−1.4 (1.5)−0.04 (0.95)−1.35 (−1.83–−0.88)***
Length cm66.3 (7.7)69.2 (7.6)−2.9 (−5.6–−0.2)*
Length SD score−0.52 (1.5)0.69 (0.96)−1.21 (−1.68–−0.74)***
  • Data are presented as mean (sd) unless otherwise stated

  • #: difference (95% confidence interval)

  • : median (range)

  • *: p<0.05

  • ***: p<0.001