Table 3 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