Subject characteristics
| Age yrs | 67±6 |
| FEV1 L | 1.19±0.53 |
| FEV1 % pred | 36±17 |
| FVC L | |
| FVC % pred | 81±21 |
| Pa,O2 mmHg | 68±14 |
| Pa,CO2 mmHg | 40±6 |
| Cognitive function | |
| MMSE | 28.9±1.1 |
| Babcock | |
| Immediate | 15.6±3.4 |
| Delayed | 13.2±3.8 |
| Ratio | 0.88±0.26 |
| Symptom experience | |
| 14-day dyspnoea variance | 1.9±1.8 |
| 14-day fatigue variance | 1.7±1.4 |
| PFSDQ-M | 4.9±1.8 |
| Dyspnoea today | 3.8±1.9 |
| Dyspnoea on most days | 4.7±1.8 |
| Dyspnoea with day-to-day activities | 29.0±20.0 |
| Dyspnoea total score with activities Fatigue today | 4.3±1.6 |
| Fatigue on most days | 3.8±2.1 |
| Fatigue with day-to-day activities | 4.4±1.8 |
| Fatigue total score with activities | 25.8±19.5 |
| BESC | |
| Dyspnoea | 17.6±3.8 |
| Fatigue | 15.9±4.5 |
| Poor memory | 14.8±4.4 |
| Helplessness/hopelessness | 14.3±6.2 |
Data reported as mean±sd
FEV1: forced expiratory volume in one second
FEV: forced vital capacity
Pa,O2: oxygen tension in arterial blood
Pa,CO2: carbon dioxide tension in arterial blood
MMSE: Mini Mental State Exam
PFSDQ-M: Pulmonary Functional Status and Dyspnoea Questionnaire-modified version
BESC: Bronchitis Emphysema Symptom Checklist