Table. 1—

Baseline characteristics of the study patients

Intervention groupUsual care group
Subjects n9695
Age yrs69.4±6.569.6±7.4
Sex male50 (52)56 (59)
Living alone46 (48)40 (42)
Education ≤12th grade79 (82)73 (77)
Current smoker24 (25)25 (26)
Smoking pack-yrs57.8±40.656.1±31.3
FEV1 L0.98±0.311.00±0.33
FEV1/FVC ratio0.46±0.100.45±0.12
Dyspnoea MRC 5/544 (46)47 (49)
6-min walk test m282±91280±90
SGRQ#54.1±16.655.7±15.7
  • Data are presented as mean±sd or n (%), unless otherwise stated. FEV1: forced expiratory volume in one second; FVC: forced vital capacity; MRC: Medical Research Council; SGRQ: St George's Respiratory Questionnaire. #: lower score on the questionnaire indicates better health status.