TABLE 1.

VARIMAX ROTATION OF 11 ASTHMA-RELEVANT CLINICAL VARIABLES

Variable	Factor
	1	2	3	4
ITG Daytime Symptoms Score	0.804
ITG Nighttime Symptoms Score	0.842
ITG Functional Limitations Score	0.818
Asthma Control Test™	0.723
Post-bronchodilator FEV1, % predicted		0.719
Post-bronchodilator FEF25-75, % predicted		0.783
Post-bronchodilator FEV1/FVC, % predicted		0.858
Nasal eosinophils, %			−0.794
Nasal neutrophils, %			0.669
Blood eosinophils, %				0.719
Total serum IgE, IU/mL				0.819

Abbreviations: ITG = Integrated Therapeutics Group’s Child Asthma Short Form; IgE = Immunoglobulin E

All factors had Eigenvalues >1

The KMO measure of sampling adequacy was 0.700

The Bartlett test of sphericity had a significance of <0.001

Communality of all variables was 100%

> 65% of the total variance was explained by the factors