Table 4.

Logistic regression analysis of PM_2.5 level and POAG in subgroups.

	Odd Ratio (95% CI), Reference: Normal Level			P trend
	WHO 1.0 level	WHO 1.5 level	WHO 2.0 level
Total	0.825 (0.588–1.158)	0.982 (0.690–1.396)	1.668 (1.045–2.663)	0.0068
Hyperlipidemia
Yes	0.678 (0.419–1.097)	0.876 (0.532–1.441)	1.291 (0.661–2.521)	0.1567
No	0.999 (0.609–1.639)	1.122 (0.670–1.880)	2.148 (1.100–4.194)	0.0231
Atrial fibrillation
Yes	0.474 (0.025–8.961)	2.163 (0.108–43.256)	0.196 (0.004–9.417)	0.9929
No	0.818 (0.58–1.155)	0.957 (0.67–1.369)	1.673 (1.037–2.699)	0.0120
Anemia
Yes	0.640 (0.262–1.566)	0.559 (0.210–1.489)	0.843 (0.223–3.193)	0.5377
No	0.828 (0.571–1.202)	1.021 (0.695–1.500)	1.814 (1.092–3.012)	0.0062
Peptic ulcer
Yes	0.877 (0.243–3.166)	0.777 (0.214–2.814)	5.602 (0.597–52.587)	0.6761
No	0.832 (0.581–1.191)	1.014 (0.698–1.471)	1.651 (1.012–2.692)	0.0028

Abbreviation: CI: confidence interval. Adjusted for gender, age, low income, urbanization level, and comorbidity.