TABLE 1

Baseline (European Community Respiratory Health Survey (ECRHS) I) characteristics of the subjects participating in ECRHS II

Subjects included in the analysesSubjects not included in the analysesp-value
Subjects69843949
Female3708 (53)2100 (53)0.93
Age years34.3±7.133.7±7.2<0.001
BMI kg·m−224.1±4.024.1±4.00.53
Low education875 (13)499 (13)0.83
Smoking habits0.16
 Nonsmoker3067 (45)1793 (46)
 <15 pack-years2499 (36)1347 (35)
 ≥15 pack-years1321 (19)722 (19)
Sensitisation to allergens2130 (34)970 (35)0.49
FEV1 % predicted105.0±13.5105.0±15.20.95
AHR886 (15)398 (18)0.001
  • Data are presented as n, n (%) or mean±sd, unless otherwise stated. BMI: body mass index; FEV1: forced expiratory volume in 1 s; AHR: airway hyperresponsiveness.