Table 3.

Prevalence of bilateral blindness (<20/200) in persons by age, gender and education

		Presenting blindness		Best-corrected blindness
	Number Examined*	Prevalence No. (%)	Adjusted odds ratio (95% confidence interval)	Prevalence No. (%)	Adjusted odds ratio (95% confidence interval)
Age (yrs.)
50–59	1739	11 (0.63)	Reference	8 (0.46)	Reference
60–69	1124	13 (1.16)	1.50 (0.53–4.25)	9 (0.80)	1.23 (0.38–3.96)
>70	779	31 (3.98)	4.13 (2.14–7.94)‡	22 (2.82)	3.58 (1.58–8.08)†
Gender
Male	1527	21 (1.38)	Reference	16 (1.05)	Reference
Female	2115	34 (1.61)	0.91 (0.50–1.66)	23 (1.09)	0.85 (0.41–1.79)
Education level
No education	560	27 (4.82)	Reference	20 (3.57)	Reference
< Primary	698	5 (0.72)	0.25 (0.16–0.39)‡§	2 (0.29)	0.23 (0.13–0.42)‡§
Primary	1285	13 (1.01)		11 (0.86)
Middle school	486	4 (0.82)		3 (0.62)
High school	345	2 (0.58)		1 (0.29)
College or more	111	0 (0.00)		0 (0.00)
No information	157	4 (2.55)		2 (1.27)
All	3642	55 (1.51)		39 (1.07)

^*The multiple logistic regression odds ratios are based on the 3,485 participants with information on education level (and not the entire 3642 examined).

^†p < 0.01.

^‡p < 0.001.

^§Represents any education.