Description of participant characteristics (n=236)
| Mean | SD | Minimum | Maximum | |
| Age (years) | 74.6 | 2.6 | 70.1 | 79.1 |
| Height (cm) | 162 | 6.0 | 138 | 178 |
| Weight (kg) | 72.8 | 13.6 | 41 | 132 |
| BMI (kg/m2)) | 27.6 | 4.75 | 17.1 | 45.7 |
| FEV1 z score | 0.03 | 1.07 | −2.75 | 2.71 |
| FVC z score | 0.16 | 0.90 | −3.15 | 2.26 |
| FEV1/FVC z score | −0.33 | 0.83 | −3.38 | 1.45 |
| FeNO/ppb | 19.1 | 16.1 | 1.90 | 128 |
| logeFeNO | 2.72 | 0.66 | 0.64 | 4.85 |
SD: Standard deviation
BMI, body mass index; FeNO, fraction of exhaled nitric oxide; FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity.