Association between systemic immune-inflammation index and chronic obstructive pulmonary disease: a population-based study

Table 2 Association Between Systemic Immune-Inflammation Index and COPD

	Crude Model		Model 1		Model 2		Model 3
	OR (95% CI)	P	OR (95% CI)	P	OR (95% CI)	P	OR (95% CI)	P
Continuous	1.673(1.443,1.938)	< 0.0001	1.595(1.384,1.837)	< 0.0001	1.482(1.286,1.708)	< 0.0001	1.449(1.252,1.676)	< 0.0001
Categories
Q1	ref		ref		ref		ref
Q2	1.016(0.820,1.259)	0.882	1.004(0.809,1.246)	0.971	1.009(0.807,1.260)	0.94	1.002(0.800,1.255)	0.983
Q3	1.641(1.337,2.014)	< 0.0001	1.571(1.278,1.932)	< 0.0001	1.472(1.195,1.813)	< 0.001	1.431(1.161,1.765)	0.001
p for trend		< 0.0001		< 0.0001		< 0.001		< 0.001

Crude Model: no covariates were adjusted
Model 1: Adjusted covariates for model 1 included gender age, and race
Model 2: Adjusted covariates for model 2 included the covariates for model 1 plus education levels, PIR, smoke status, BMI, history of diabetes, hypertension and CVD.
Model 3: Adjusted covariates for model 3 included the covariates for model 2 plus WBC and CRP.
COPD, Chronic Obstructive Pulmonary Disease; OR: odds ratio. 95%CI: 95% confidence interval; Q1-3 respectively represent the groups divided according to the quantiles of SII.

ISSN: 1471-2466