Table 2.

Prevalence Rate Ratios for Age and Sex with Blindness and Moderate to Severe Visual Impairment Resulting from Nontrachomatous Corneal Opacity

Variable	Blindness			Moderate to Severe Visual Impairment
	Rate Ratio Estimate	95% Confidence Interval	P Value	Rate Ratio Estimate	95% Confidence Interval	P Value
Increase with each 10 yrs in age	2.15	1.99–2.32	< 0.0001	1.86	1.73–2.00	< 0.0001
Female vs. male sex	0.92	0.77–1.098	0.33	1.04	0.83–1.31	0.71