| Age < 65 years, n=655 | Age ≥ 65 years, n=99 | p value |
Smoking status %: current, former, never | 10.3% , 25.3%, 64.2% | 3.1%, 47.9%, 48.9% | <0.001 |
Asthma control questionnaire score | 3.4 (2.3, 4.1) | 3.1 (2.5, 4.1) | 0.446 |
Total asthma quality of life score | 3.4 (2.5, 4.3) | 3.5 (2.7, 4.5) | 0.284 |
Unscheduled emergency visits in past yr | 4 (2, 6.5) | 3 (2, 6) | 0.047 |
Rescue steroid courses past yr | 5 (2, 7) | 3 (2, 5.7) | 0.001 |
Post BD FEV1 % predicted | 78 (58, 94) | 69 (54, 82) | 0.023 |
Sputum neutrophil count % | 50 (22, 75) | 41 (22, 76) | 0.628 |
Sputum eosinophil count % | 2.9 (0.6, 10.1) | 1.8 (0.4, 10.6) | 0.617 |