Table 3

Correlation between the different markers at baseline and day 1 of asthma exacerbation

	Asthma score (parent recorded)	Cough score (child recorded)	Cough score (parent recorded)	Child's QOL	Parents' QOL	IL-8	Sputum ECP
Results expressed as Spearman correlation (two tailed p value).
Baseline
Asthma score	0.93	0.81	0.84	−0.91	−0.76	0.1	0.32
(child recorded)	(0.0001)	(0.002)	(0.001)	(0.0001)	(0.006)	(0.7)	(0.37)

Asthma score		0.91	0.91	−0.934	−0.8	−0.12	0.4
(parent recorded)		(0.0001)	(0.0001)	(0.0001)	(0.003)	(0.74)	(0.25)

Cough score			0.96	−0.78	−0.73	−0.32	0.54
(child recorded)			(0.0001)	(0.005)	(0.011)	(0.36)	(0.11)

Cough score				−0.73	−0.73	−0.41	0.24
(parent recorded)				(0.001)	(0.012)	(0.24)	(0.51)

Child's QOL					0.7	0.08	−0.29
					(0.017)	(0.81)	(0.42)

Parents' QOL						−0.21	−0.03
						(0.55)	(0.9)

IL-8							−0.08
							(0.83)

Day 1
Asthma score	0.75	0.88	0.84	−0.014	0.24	−0.76	−0.83
(child recorded)	(0.008)	(0.001)	(0.001)	(0.97)	(0.48)	(0.031)	(0.01)

Asthma score		0.75	0.78	−0.27	−0.22	−0.79	−0.76
(parent recorded)		(0.013)	(0.004)	(0.43)	(0.51)	(0.02)	(0.03)

Cough score			0.97	0.11	0.19	−0.43	−0.58
(child recorded)			(0.0001)	(0.76)	(0.6)	(0.29)	(0.13)

Cough score				−0.27	0.2	0.55	−0.58
(parent recorded)				(0.43)	(0.56)	(0.16)	(0.14)

Child's QOL					0.51	0.29	−0.17
					(0.11)	(0.49)	(0.69)

Parents' QOL						0.12	−0.14
						(0.48)	(0.74)

IL-8							0.43
							(0.34)