Table 1– Comparison of age, forced expiratory volume in 1 s (FEV1) body mass index (BMI) and days on i.v. antibiotics in females with cystic fibrosis (CF) using oral contraceptives (OCs) (“exposed” cohort) and in females with CF not using OCs (“not exposed” cohort) in the first year of analysis
ParameterAll femalesExposed cohortNot exposed cohortp-value#
Age yrs23 (16–45)23 (16–45)22 (17–44)0.995
 Subjects1125656
FEV1 % pred52.5 (12.8–119.6)56.2 (20.4–111.1)48.4 (12.8–119.6)0.73
 Subjects1105555
BMI kg·m−220.1 (15.0–28.2)20.1 (15.2–28.2)20.1 (15.0–26.1)0.98
 Subjects1105555
Days on i.v. antibiotics0 (0–126)0 (0–70)7 (0–126)0.38
 Subjects1085454
  • Data are presented as median (range) or n, unless otherwise stated. % pred: % predicted. #: p-values relate to comparisons between females exposed and not exposed to OCs.