Table 3– Odds ratios for determinants of longitudinal changes in physical activity in subjects with and without chronic obstructive pulmonary disease (COPD)#
Baseline physical activity
LowModerateHigh
Increase (95% CI)Decrease (95% CI)Increase (95% CI)Decrease (95% CI)
Subjects with COPD1.672 (1.127–2.477)0.507 (0.346–0.741)0.553 (0.400–0.765)
 FEV1 L
 Age years0.980 (0.963–0.998)
 Sex
  Female0.602 (0.428–0.848)
  Male1.0
 Smoker
  Yes0.536 (0.355–0.811)
  No1.0
 Cohabitation
  With others1.456 (1.006–2.109)
  Alone1.0
 Smoking years1.020 (1.001–1.041)
Subjects without COPD
 FEV1 L0.811 (0.690–0.953)0.817 (0.720–0.927)
 Age years1.008 (1.001–1.015)
 Sex
  Female1.441 (1.150–1.806)0.614 (0.542–0.694)
  Male1.01.0
 Smoker
  Yes1.319 (1.077–1.616)1.340 (1.096–1.639)0.891 (0.780–0.999)1.381 (1.189–1.605)
  No1.01.01.01.0
 Marital status
  Married/cohabiting1.064 (1.009–1.123)0.847 (0.731–0.981)
  Other1.0
 Education years0.883 (0.841–0.928)1.039 (1.006–1.073)0.951 (0.918–0.986)
 Comorbidities
  Yes1.530 (1.281–1.828)1.161 (1.009–1.336)
  No1.01.0
 BMI kg·m−2
  >251.218 (1.047–1.416)
  20–251.0
  • FEV1: forced expiratory volume in 1 s; BMI: body mass index. #: adjusted for age and sex. The complete models are included in tables E4 and E5.