Table 3

Infant correlation for purchase of asthma medication at age of 3 years for 50 children

	Budesonide (mg)^*		Salbutamol (mg)^*
	Correlation	p Value^†	Correlation	p Value^†
Infant lung function
Abnormal^‡	0.375	0.007	0.445	0.001	Mann–Whitney U test
sGaw (Z-score)	−0.168	0.243	−0.170	0.239	Spearman test
FRC (Z-score)	0.026	0.856	0.137	0.343	Spearman test
Infant skin prick test positive	−0.051	0.727	−0.107	0.461	Mann–Whitney U test
Infant bronchial biopsy
RBM (mm)	0.406	0.003	0.201	0.162	Spearman test
Mast cells	0.378	0.018	0.228	0.163	Spearman test
Symptoms during infancy
Frequent wheeze	0.300	0.034	0.121	0.402	Mann–Whitney U test
Wheeze between colds	0.102	0.482	0.125	0.388	Mann–Whitney U test

Bold denotes p<0.05.
↵* Purchase of inhaled budesonide or salbutamol during third year of life expressed in mg.
↵† Z-test for Spearman correlation coefficient but, if one of the variables is dichotomous, the Mann–Whitney U test was used.
↵‡ Abnormal LF defined as reduced LF (sGaw Z-score <−1.65).
FRC, functional residual capacity; RBM, reticular basement membrane; sGaw, specific airway conductance.