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Descriptives of the control group (mean [SD]) (n = 151)
| Males (n = 66) | Females (n = 85) | P | |
|---|---|---|---|
| Age (years) | 72 (5) | 72 (5) | 0.43 |
| Body mass index (kg/m2) | 26.0 (3.0) | 25.5 (3.8) | 0.37 |
| FEV1 (percentage predicted) | 102 (15) | 107 (17) | 0.053 |
| Percentage of current smokers | 5 | 12 | – |
Abbreviations: FEV1, forced expiratory volume in one second; SD, standard deviation.
