Systemic Inflammation and Lung Function Impairment in Morbidly Obese Subjects with the Metabolic Syndrome

Table 6

Multiple regression analysis FEV₁/FVC ratio.

	Whole group (𝑛=408) (Adj 𝑅^2 = 0.074)
	Regression coefficient	95% CI	𝑃 value
Eosinophils (%)	−0.113	−1.247–−0.118	0.018
Use of inhalation corticosteroids	−0.025	−3.635–2.122	0.606
Pack years	−0.259	−0.162–−0.076	<0.001

Variables associated with FEV₁/FVC ratio in univariate analysis at a 𝑃 value of <0.1 were examined in the multiple linear regression analysis. Since the FEV₁/FVC ratio as percentage predicted is already corrected for height, age, and gender, we did not add this variable to the model. As eosinophils and abdominal circumference are correlated, we selected only one variable to prevent colinearity. We omitted OSAS because of the large proportion of missing data.