Table 1.

Test–retest reliability (reproducibility) of LCQ scores: participants reporting ⩽10-mm change on the cough severity VAS from baseline to week 4 (n = 61).

LCQ domain	Baseline, mean (SD)	Week 4, mean (SD)	Difference a	p value	Pearson’s r b	ICC
Total score	12.5 (3.41)	13.6 (3.79)	1.1	<0.0001	0.84	0.80
Physical	4.7 (1.02)	5.0 (1.03)	0.2	0.0069	0.77	0.75
Psychological	4.0 (1.38)	4.4 (1.47)	0.3	0.0026	0.82	0.80
Social	3.7 (1.34)	4.3 (1.61)	0.5	<0.0001	0.81	0.75

ICC, intraclass correlation coefficient; LCQ, Leicester Cough Questionnaire; SD, standard deviation; VAS, visual analogue scale.

^aDifference = week 4 − baseline for daily score.

^bPearson’s product–moment correlation.