Characteristics | Mean (SD) or % |
---|---|
Age, (years) | 55.4 (6.3) |
Smoking history, (pack years) | 27.1 (19.3) |
No employment/retired | 29% |
Living alone | 9% |
Comorbiditya | 27% |
Chronic cough | 23% |
BMI | 26.6 (3.8) |
FEV1 (L) | 3.5 (0.7) |
FEV1 % predicted | 98 (16) |
Lung function | |
No airflow limitation | 59.7% |
Mild COPD (GOLD I) | 29.6% |
Moderate COPD (GOLD II) | 10.6% |
Functional limitations by dyspnoea | |
None | 74.9% |
Mild (MRC I-II) | 17.7% |
Moderate or severe (MRC III-V) | 7.3% |
Generic QOL componentsb (range 0–100) SF36 | |
Physical functioning | 86.3 (17.7) |
Role functioning (physical) | 85.9 (29.5) |
Bodily pain | 83.3 (22.5) |
General health | 66.1 (18.8) |
Vitality | 68.3 (19.2) |
Social functioning | 87.9 (18.4) |
Role functioning (emotional) | 88.9 (26.9) |
Mental health | 78.4 (16.4) |
Disease specific QOL componentsb (range 1–7) | |
QOLRIQ | |
Total score | 6.5 (0.5) |
Breathing problems | 6.1 (0.8) |
Physical problems | 6.4 (0.7) |
Emotions | 6.5 (0.7) |
General activities | 6.6 (0.8) |
Situations triggering or enhancing breathing problems | 6.7 (0.6) |
Daily and domestic activities | 6.5 (0.6) |
Social activities/relationships/sexuality | 6.8 (0.5) |
↵a Comorbidity denotes cardiovascular disease, diabetes mellitus, musculoskeletal disease, cancer, renal disease.
↵b Higher scores indicate a better quality of life. BMI = body mass index; FEV1 = forced expiratory volume in one second; COPD = chronic obstructive pulmonary disease; GOLD = global initiative for chronic obstructive lung disease guidelines; (L) = Litres; MRC = Medical Research Council; QOL = quality of life; QOLRIQ = quality of life in respiratory illness questionnaire.