TABLE 1.
Participant demographics
| Cohort 1 CHQ development (UK) |
Cohort 2 Validation (UK/South Korea) |
Cohort 3 Cognitive debrief (UK) |
|
|---|---|---|---|
| Number | 10 | 535 | 13 |
| Age, years | 63 (55–67) | 58 (45–67) | 56 (46–70) |
| Female sex, n (%) | 7 (70) | 371 (69) | 9 (69) |
| Smoking status, n (%) | |||
| Never | 7 (70) | 383 (73) | 9 (69) |
| Ex-smoker | 2 (20) | 102 (20) | 4 (31) |
| Current | 1 (10) | 37 (7) | 0 (0) |
| Duration of cough, months, n (%) | |||
| 0 to ≤6 | 0 | 214 (41) | 0 |
| 6 to ≤12 | 0 | 69 (13) | 0 |
| 12 to ≤60 | 3 (30) | 146 (28) | 6 (46) |
| >60 | 7 (70) | 98 (18) | 7 (54) |
| VAS cough severity | 74±12 | 61±20 | 64±21 |
| LCQ | |||
| Physical | 3.5 (2.7–3.9) | 4.0 (4.0–5.0) | 3.8 (2.7–5.9) |
| Psychological | 2.1 (1.7–2.6) | 4.0 (2.0–4.0) | 2.7 (1.9–4.9) |
| Social | 2.0 (1.8–3.1) | 3.0 (2.0–4.3) | 2.9 (1.8–4.7) |
| Total score | 7.5 (6.8–9.0) | 11.0 (9.0–13.0) | 9.7 (7.1–14.9) |
| CHQ | |||
| Sensations | 4.5 (2.8–5.0) | 4 (2–5) | 4 (3–5) |
| Triggers | 9.5 (7.5–12.3) | 5 (3–8) | 9 (8–12) |
| Total score | 15 (11–18) | 9 (6–12) | 14 (12–16) |
Data are displayed as mean±sd or median (interquartile range) unless otherwise stated. CHQ: Cough Hypersensitivity Questionnaire (total score range 0–22); VAS: visual analogue scale (range 0–100 mm); LCQ: Leicester Cough Questionnaire (total score range 3–21).