Table 2.
R value | P value | |
---|---|---|
Post-bronchodilator FEV1 (L) | 0.04 | 0.81 |
FEV/FVC ratio, % | −0.02 | 0.94 |
Chronic respiratory disease questionnaire, units | 0.09 | 0.63 |
Total visual analogue scale, mm | 0.11 | 0.58 |
FEV1 – Forced expiratory volume in 1 s; FVC - Forced vital capacity; Chronic Respiratory Disease Questionnaire, scores range between 1 to 7 with higher score representing better health quality; Visual Analogue Scale, performed on 100 mm line from ‘no symptoms’ to ‘worst symptoms’, higher scores represent worse symptoms (total score addition of measured domains: cough, dyspnoea, sputum production and sputum purulence)