Correlation between differences (change) of day 7 and day 1 of the different markers of cough severity
| Spearman correlation (95% CI) | ||||
|---|---|---|---|---|
| Change in log cough score (child recorded) | Change in log cough score (parent recorded) | Change in log C2* | Change in log C5† | |
| C2, concentration of capsaicin that produced 2–4 coughs; C5, concentration of capsaicin that produced 5 or more coughs. All differences refer to value of day 7 − value of day 1. | ||||
| Day 1 | ||||
| Change in log cough score (parent recorded) (n=37) | 0.65 (p=0.00001) (0.40 to 0.80) | |||
| Change in log C2 (n=23) | −0.12 (−0.51 to 0.30) | −0.38 (−0.68 to 0.04) | ||
| Change in log C5 (n=37) | −0.05 (−0.37 to 0.28) | −0.38 (p=0.024) (−0.63 to −0.07) | 0.63 (p=0.00001) (0.28 to 0.83) | |
| Change in log cough frequency per 24 hours (n=37) | 0.38 (p=0.03) (0.04 to 0.64) | 0.36 (p=0.047) (0.01 to 0.63) | −0.40 (p=0.06) (−0.70 to 0.02) | −0.38 (p=0.03) (−0.63 to −0.07) |