Table 2

Multiple linear regression models to evaluate the role of total sIgE levels and other predictors in the relationship with FENO levels or blood eosinophilia

Dependent variable	Independent variables	β	SE (β)	p Value
Log FENO levels (ppb)	Log total sIgE levels (kU/l)	0.400	0.077	<0.0001
	Age (years)	−0.040	0.019	0.043
	Sex: male	−0.084	0.084	0.323
	Number of positive specific IgE tests to allergens	0.0004	0.029	0.891
	Intercept	0.581	0.303
Multiple R 0.590; R² 0.348; p<0.0001
Log eosinophil count (number of cells/mm³)	Log total sIgE levels (kU/l)	0.349	0.055	<0.0001
	Age (years)	−0.029	0.014	0.038
	Sex: male	0.079	0.060	0.189
	Number of positive specific IgE tests to allergens	−0.005	0.021	0.820
	Intercept	1.900	0.215
Multiple R 0.649; R² 0.421; p<0.0001
Log eosinophil percentage	Log total sIgE levels (kU/l)	0.379	0.050	<0.0001
	Age (years)	−0.034	0.013	0.008
	Sex: male	0.058	0.055	0.293
	Number of positive specific IgE tests to allergens	−0.001	0.019	0.943
	Intercept	0.059	0.197
Multiple R 0.710; R² 0.505; p<0.0001

FENO, exhaled nitric oxide; ppb, parts per billion; SIgE, serum IgE.; β, regression coefficient.