Proportion achieving ⩾6/12 in the three age groups of patient eyes with and without preoperative eye comorbidity
| Preoperative eye comorbidity | Age group | No of eyes | No (%) with postoperative visual acuity ⩾6/12 |
p value (test of trend) |
| Absent | 60–69 | 214 | 208 (97.2) | <0.001 |
| 70–79 | 306 | 286 (93.5) | ||
| 80+ | 222 | 193 (86.9) | ||
| Subtotal | 742 | |||
| Present | 60–69 | 43 | 20 (46.5) | 0.8 |
| 70–79 | 54 | 28 (51.9) | ||
| 80+ | 41 | 18 (43.9) | ||
| Subtotal | 138 |