Slow decliners (n = 290) | Fast decliners (n = 261) | P value | |
---|---|---|---|
Age | 47.4 ± 0.4 | 49.6 ± 0.4 | 0.0007 |
Male (%) | 193 (66.6) | 155 (59.4) | 0.082 |
Pack-years | 38.3 ± 1.1 | 43.2 ± 1.2 | 0.002 |
Baseline FEV1, % predicted* | 79.8 ± 0.5 | 74.6 ± 0.6 | <0.0001 |
Methacholine response† | −8.0 ± 0.9 | −24.2 ± 2.1 | <0.0001 |