Table 4.

Adjusted odd ratios of metabolic syndrome and its components in overall population with 10-μg/m³ increase in PM_2.5

Variables	MetS				Central obesity				High TG
	AIC	OR (95%CI)	P		AIC		OR (95%CI)	P	AIC	OR (95%CI)	P
Model 1	7522.5	1.14(1.01, 1.29)	0.039*		8181.9		1.04 (0.93, 1.16)	0.516	6757.9	1.36 (1.34, 1.38)	< 0.001*
Model 2	5807.8	1.17(1.15, 1.19)	< 0.001*		4075.2		1.02 (0.85, 1.23)	0.806	6190.5	1.40 (1.21, 1.62)	< 0.001*
Model 3	5807.8	1.17(1.01, 1.35)	0.042*		4060.1		0.98 (0.82, 1.18)	0.813	6183.0	1.36 (1.18, 1.58)	< 0.001*
Variables	Low HDL-c			Hypertension					High FBG
	AIC	OR (95%CI)	P	AIC		OR (95%CI)		P	AIC	OR (95%CI)	P
Model 1	8989.0	1.00 (0.90, 1.12)	0.944	9171.0		1.04 (0.93, 1.16)		0.506	7302.1	1.17 (1.02, 1.35)	0.023*
Model 2	8358.3	0.98 (0.87, 1.11)	0.784	7680.7		1.02 (0.90, 1.16)		0.721	6871.9	1.15 (1.01, 1.33)	0.047*
Model 3	8318.3	0.99 (0.88, 1.12)	0.867	7658.5		1.03 (0.91,1.16)		0.682	6823.2	1.18 (1.02, 1.36)	0.026*

Model 1: Exposure to PM_2.5;

Model 2: Model 1 adjusted with age, sex, education, marital status, body mass index, household income;

Model 3: Model 2 adjusted with exercise, cigarette smoking status, biomass fuel, alcohol consumption, red meat consumption

AIC Akaike information criterion, CI Confidence interval, FBG Fasting blood glucose, HDL-c High-density lipoprotein cholesterol, MetS Metabolic syndrome, OR Odd ratio, TG Triglyceride