Correlations between changes in subjective estimates of cough frequency (cough scores and visual analogue scale, VAS) and time spent coughing during the day and night
| Change in day cough rate | Change in night cough rate | |
|---|---|---|
| Change in cough score | r = 0.34, p = 0.204 | r = 0.19, p = 0.510 |
| Change in VAS | r = 0.47, p = 0.070 | r = 0.81, p = 0.001 |