Subjects n (%) | 74 (23) | 48 (15) | 24 (7) | 118 (37) | 57 (18) | |
Asthma/COPD | 64.9/35.1 | 65.1/34.9 | 60.0/40.0 | 61.0/39.0 | 73.7/26.3 | 0.57 |
Age years | 53.9±19.9 | 54.5±14.8 | 57.8±16.7 | 53.6±17.8 | 50.5±18.1 | 0.42 |
Female/male | 83.5/16.5 | 39.8/61.2 | 55.0/45.0 | 57.6/49.4 | 57.1/42.9 | 0.06 |
BMI kg·m-2 | 29.6±5.2 | 26.3±5.9 | 24.7±3.4 | 27.4±6.3 | 28.7±6.3 | 0.04 |
Caucasian/non-Caucasian | 91.0/9.0 | 86.7/13.3 | 10.0/90.0 | 88.7/11.3 | 83.9/16.1 | <0.01 |
Postbronchodilator FEV1 % predicted | 79.8±29.1 | 78.1±26.4 | 68.9±26.5 | 78.5±25.2 | 83.9±22.8 | 0.31 |
FeNO ppb¶ | 23.1±7.8 n=30 | 48.6±11.0 n=22 | 34.7±9.8 n=10 | 41.2±15.1 n=58 | 27.6±8.4 n=29 | <0.01 |
Smoking (never/ex/current) n/n/n | 31/35/8 | 19/25/4 | 8/13/3 | 41/58/19 | 26/26/5 | 0.57 |
Smoking pack-years | 15.4±21.2 | 17.9±23.9 | 26.3±34.5 | 20.1±34.9 | 15.6±24.1 | 0.24 |
Atopic/non-atopic¶ | 54.7/45.3 n=42 | 58.1/41.9 n=31 | 61.1/38.9 n=18 | 84.0/16.0 n=75 | 52.5/47.5 n=40 | <0.01 |
Eosinophil blood counts ×109 cells·L-1 | 0.23±1.1 | 0.69±1.2 | 0.45±1.3 | 0.34±0.6 | 0.31±0.2 | 0.02 |
Neutrophil blood counts ×109 cells·L-1 | 4.98±2.2 | 5.44±2.9 | 6.35±3.2 | 8.44±3.1 | 5.49±2.8 | 0.03 |
ACQ | 2.87±5.5 | 1.80±1.1 | 2.36±1.4 | 2.17±2.8 | 1.73±0.9 | 0.71 |
CCQ | 4.98±2.2 | 2.36±0.5 | 3.89±4.6 | 2.73±1.5 | 2.73±1.3 | 0.98 |
Exacerbations requiring treatment in past 3 months n per patient | 0.22±0.4 | 0.25±0.5 | 0.04±0.2 | 0.43±0.3 | 0.14±0.3 | <0.01 |
ICS use | 70.3 | 83.7 | 55.0 | 66.7 | 78.2 | 0.05 |
OCS use | 14.9 | 4.2 | 0 | 13.6 | 10.5 | 0.18 |
Food/drink consumption in 2 h prior to exhaled breath measurement | 83.9 | 95.3 | 90.0 | 84.5 | 80.4 | 0.28 |