Table 6.

Difference of Prevalence and Adjusted Odds Ratio of Glaucoma, Stratified According to Quartile Categories of Blood Folate Level Among Representative Korean Adults Aged Under 60 Years or Older

	Quartile Blood Folate Level (ng/mL)
	Quartile 1	Quartile 2	Quartile 3	Quartile 4	P for Trend
Age < 60 years
Glaucoma prevalence*	3.2 (0.5, 2.4–4.3)	2.9 (0.8, 1.7–4.9)	2.7 (1.0, 1.3–5.5)	1.5 (0.4, 0.9–2.4)	0.691
Unweighted number	8	6	6	5
OR	1.0 (reference)	0.707 (0.385–1.297)	0.471 (0.242–0.920)	0.443 (0.229–0.856)	0.045†
Age ≥ 60 years
Glaucoma prevalence*	6.4 (1.3, 4.3–9.4)	6.5 (1.2, 4.5–9.2)	8.0 (1.4, 5.7–11.2)	4.6 (0.8, 3.3–6.5)	0.012†
Unweighted number	12	10	10	10
OR	1.0 (reference)	0.975 (0.470–2.023)	1.112 (0.519–2.383)	0.538 (0.245–1.185)	0.052

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

^† P < 0.05