Study participant demographics
| Patients | 27 |
| Age, years | 50.3±13.9 53 (25–79) |
| Male/female | 15/12 |
| BMI, kg·m−2 | 24.4±0.8 |
| Cough severity VAS, mm | 41.6±23.4 |
| Average cough epochs in first 24 h | 88.5±79 |
| Underlying condition | |
| Chronic cough of unknown origin | 12 (45) |
| COPD | 4 (15) |
| Asthma | 5 (18) |
| Interstitial lung disease | 6 (22) |
Data are presented as n, mean±sd, median (range) or n (%). BMI: body mass index; VAS: visual analogue scale.