Group characteristics at birth
| CF (n = 39) | Control (n = 21) | Mean (95% CI) difference* | |
|---|---|---|---|
| CF, cystic fibrosis. | |||
| Results expressed as mean (SD) unless otherwise specified. | |||
| *Difference calculated as cystic fibrosis−control. | |||
| Boys (%) | 12 (31) | 9 (43) | –12 (–36 to 12) |
| Gestational age (weeks) | 39 (2.1) | 39.7 (1.2) | –0.8 (–1.6 to 0.1) |
| Birth weight (kg) | 3 (0.6) | 3.3 (0.4) | –0.3 (–0.6 to 0.02) |
| Birth weight (Z score) | –0.5 (1.1) | –0.3 (0.8) | –0.2 (–0.8 to 0.3) |
| Maternal smoking during pregnancy, n (%) | 12 (31) | 6 (29) | 2% (–22 to 24) |
| Maternal ethnic group,n (%) white | 36 (92) | 20 (95) | –3% (–16 to 16) |
| Maternal history of asthma, n (%) | 14 (36) | 5 (24) | 12% (–13 to 33) |