Table 4.
Relation between cataract blindness and sociodemographic variables
| Sociodemographic variables | Cataract blindness (95% CI) | Proportion of all blind attributed to cataract | Adjusted OR (95% CI) | Test of significance | Trend of odds for category |
| 50+ Population | 5.30% (4.97 to 5.62) | 62.4% | |||
| Age category | |||||
| 50–59 years (29 851) | 1.85% (1.65 to 2.05) | 54.77% | 1.0 | ||
| 60–69 years (21 445) | 5.63% (5.15 to 6.11) | 62.41% | 2.7 (2.4 to 3.0) | χ2, 360.0 | |
| 70+ years (12 041) | 13.3% (12.47 to 14.13) | 65.52% | 5.8 (5.2 to 6.6) | χ2, 1056.7 | χ2, 1160.3 p<0.00001 |
| Sex | |||||
| Male (29 980) | 4.14% (3.82 to 4.42) | 59.34% | 1.0 | ||
| Female (33 357) | 6.35% (5.93 to 6.77) | 64.34% | 1.4 (1.3 to 1.5) | χ2, 52.55 | χ2, 52.55 p<0.00001 |
| Place of residence | |||||
| Urban (9691) | 4.01% (3.37 to 4.64) | 61.94% | 1.0 | ||
| Rural (53 646) | 5.54% (5.17 to 5.91) | 62.45% | 1.2 (1.1 to 1.4) | χ2, 12.36 | χ2, 12.36 p = 0.0004 |
| Literacy | |||||
| Grade 10+ (1982) | 1.11% (0.63 to 1.59) | 59.46% | 1.0 | ||
| Grade 6–10 (5304) | 1.28% (0.96 to 1.59) | 57.14% | 0.9 (0.6 to 1.5) | χ2, 0.09 | |
| Up to grade 5 (11 036) | 2.76% (2.39 to 3.13) | 57.33% | 1.7 (1.1 to 2.6) | χ2, 5.69 | |
| Illiterate (44 837) | 6.59% (6.21 to 6.97) | 63.09% | 3.5 (2.3 to 5.3) | χ2, 39.21 | χ2, 224.65 p<0.00001 |
| Work status | |||||
| Active work (27 107) | 3.18% (2.86 to 3.5) | 61.06% | 1.0 | ||
| Household work (24 626) | 4.41% (4.02 to 4.80) | 62.67% | 1.0 (0.9 to 1.2) | χ2-0.34 | |
| Not working at all (11 485) | 12.12% (11.22 to 13.02) | 62.96% | 1.8 (1.6 to 2.0) | χ2, 118.74 | χ2, 147.77 p<0.0001 |