Table 1.
Demographics of study population.a
| COPD (n = 185) | Control (n = 106) | p Value | |
|---|---|---|---|
| Age (years)b | 68 (57–79) | 66 (54–78) | 0.04 |
| Gender (male n %) | 116 (63) | 65 (61) | 0.87 |
| Smoking status % current | 30% | 21% | 0.09 |
| Smoking pack-years (pack-years)b | 42 (15–69) | 23 (13–49) | <0.001 |
| FEV1 (l) | 1.6 (0.6) | 2.8 (0.7) | <0.001 |
| FEV1% predicted (%) | 58 (18) | 100 (14) | <0.001 |
| FEV1/FVC ratio | 49 (13) | 74 (7) | <0.001 |
| Resting oxygen saturations (%)b | 95 (94–96) | 96 (95–97) | <0.001 |
| Carbon monoxide (ppm)b | 3 (1–13) | 2(1–6) | 0.0661 |
| CAT score | 19 (9) | 7 (6) | <0.001 |
| SGRQ total score | 40 (21) | 8 (9) | <0.001 |
| BMI (kg/m2) | 27.2 (5.5) | 27.8 (4.6) | 0.32 |
| FFMI (kg/m2; 175 patients, 102 controls) | 18.4 (2.8) | 18.9 (2.3) | 0.12 |
BMI: body mass index; CAT: COPD assessment test; FEV1: forced expired volume in 1 second; FEV1/FVC: forced expired volume in 1 second to forced vital capacity ratio; FFMI: fat-free mass index; SGRQ: St George’s Respiratory Questionnaire.
aPresented as mean and SD unless otherwise stated.
bmedian (inter-quartile range),