Descriptive statistics for health outcomes and confounders included in the analysis (baseline characteristics and repeated measurements)
| Variable | Mean (SD)* or n (%)† |
| Baseline characteristics (76 participants) | |
| Sex (females)—n (%) | 39 (51.3) |
| Age—mean (SD) | 70.7 (7.8) |
| Medication use: inhaled corticosteroids (yes)—n (%) | 55 (72.4) |
| Index of Multiple Deprivation Score—mean (SD) | 21.1 (12.3) |
| COPD severity—n (%) | |
| Mild | 12 (15.8) |
| Moderate | 35 (46.1) |
| Severe | 19 (25.0) |
| Very severe | 10 (13.2) |
| Repeated measurements (10 210 person-days) | |
| Exacerbation (yes)—n (%) | 1363 (13.4) |
| Breathlessness (yes)—n (%) | 1608 (15.8) |
| Cough (yes)—n (%) | 1467 (14.4) |
| Sleep disturbance (yes)—n (%) | 1042 (10.2) |
| Sputum (yes)—n (%) | 710 (7.0) |
| Wheeze (yes)—n (%) | 1146 (11.2) |
| Peak expiratory flow (L/min)—mean (SD) | 236 (105) |
| Ambient temperature (oC)—mean (SD) | 21.1 (2.4) |
| Time spent outdoors per day (hours)—mean (SD) | 1.5 (1.2) |
| Stayed all day home (yes)—n (%) | 5113 (50.1) |
*Mean and SD for continuous variables.
†Number of occurrences (n) and percentage across the whole sample/person-days for categorical variables.
COPD, chronic obstructive pulmonary disease.