Comparisons of characteristics between subjects with bilateral cataract and those with bilateral surgery
| Bilateral cataract surgery (n=151) | Bilateral significant cataract (n=515) | p Value† | Bilateral minimal cataract (n=2126) | p Value† | |
| Age, years | 69.7 (6.8) | 69.9 (6.5) | 0.749 | 53.4 (8.7) | <0.001 |
| Gender, male | 77 (51.0) | 227 (44.1) | 0.134 | 1028 (48.4) | 0.531 |
| Age-related macular degeneration | 13 (8.6) | 45 (8.8) | 0.945 | 71 (3.3) | 0.001 |
| Diabetic retinopathy | 48 (31.8) | 39 (7.6) | <0.001 | 258 (12.2) | <0.001 |
| Glaucoma | 14 (9.3) | 38 (7.4) | 0.446 | 73 (3.4) | <0.001 |
| Any cardiovascular disease | 22 (14.6) | 69 (13.4) | 0.712 | 205 (9.6) | 0.051 |
| Current cigarette smoking | 13 (8.6) | 85 (16.5) | 0.016 | 493 (23.2) | <0.001 |
| Low socioeconomic status | 72 (47.7) | 241 (46.8) | 0.848 | 304 (14.3) | <0.001 |
Data are presented as mean (SD) or number (%), as appropriate.
Cardiovascular disease is defined as a history of angina, myocardial infarction or stroke; low socioeconomic status is defined as having a primary or lower education and an individual monthly income less than $S2000.
↵† p Value to test for difference between bilateral cataract surgery compared with bilateral cataract and both eyes healthy, respectively, based on either a t test or χ2 test, as appropriate.