Table 4.

Prevalence and Adjusted Odds Ratio of Glaucoma, Stratified According to Quartile Categories of Blood Folate Level Among Representative Korean Adults Aged 40 Years or Older

	Folate Level (ng/mL)
	<5.10 (n = 420)	5.10–7.10 (n = 441)	7.10–10.00 (n = 430)	>10.00 (n = 499)	P for Trend
Glaucoma
Prevalence*	4.2 (0.5, 3.3–5.3)	3.8 (0.6, 2.7–5.3)	4.2 (0.8, 2.9–6.1)	2.5 (0.4, 1.9–3.3)	0.105
Unweighted number	20	16	16	15
OR
	1.0 (reference)	0.903 (0.588–1.386)	1.009 (0.718–1.417)	0.589 (0.407–0.851)	0.045†
Model 1	1.0 (reference)	0.986 (0.626–1.551)	1.008 (0.715–1.655)	0.606 (0.391–0.938)	0.053
Model 2	1.0 (reference)	0.811 (0.522–1.257)	0.764 (0.477–1.223)	0.470 (0.291–0.759)	0.017†

Model 1: adjusted for sex and age. Model 2: adjusted for sex, age, diabetes, systemic hypertension, hypercholesterolemia, and smoking.

^*Prevalence was expressed as weighted estimates [%] (standard errors [%], 95% confidence intervals).

^† P < 0.05.