Table II. Correlation between 25(OH)D and COPD using multivariable logistic regression.

Variable	β	Wald	p	OR (95% CI)
Unadjusted	−0.169	6.976	0.008	0.845 (0.745, 0.957)
Adjusted	−0.156	4.262	0.039	0.856 (0.738, 0.992)

Adjusted for smoker (percentage), leukocyte, and neutrophil.

CI, confidence interval; OR, odds ratio.