Table 4
Multiple regression analysis of predictors of visual acuity and area of CNVM 2 years after the start of the follow up, and their changes
| Variable entered | r | F test | Correlation equation | |
|---|---|---|---|---|
| Treatment group (N=20) | ||||
| Visual acuity at 2 years after radiotherapy | 0.598 | 4.295 | [LogMAR of post-treatment visual acuity] = +0.649 + 0.361 × [logMAR of pretreatment visual acuity] | |
| 0.661 | 4.660 | [LogMAR of post-treatment visual acuity] = +0.649 + 0.362 × [logMAR of pretreatment visual acuity] − 0.043 × [refractive error] | ||
| Change of visual acuity | 0.713 | 13.47 5 |
[Change of logMAR of post-treatment visual acuity] = +0.649 − 0.369 × [logMAR of pretreatment visual acuity] | |
| 0.795 | 10.31 8 |
[Change of logMAR of post-treatment visual acuity] = +1.178 − 0.638 × [logMAR of pretreatment visual acuity] − 0.043 × [refractive error] | ||
| Area of CNVM at 2 years after radiotherapy | 0.630 | 8.561 | [Post-treatment area of CNVM] = 0.648 + 0.479 × [pretreatment area of CNVM] | |
| Change of area of CNVM | 0.540 | 5.349 | [Change of area of CNVM] = 259.732−69.54 × [pretreatment area of CNVM] | |
| Control group (N = 19) | ||||
| Visual acuity at 2 years after the start of the follow up | — | — | — | |
| Change of visual acuity | 0.796 | 29.37 |
[Change of logMAR of post-treatment visual acuity] = +0.994 − 0.748 × [LogMAR of pretreatment visual acuity] | |
| Area of CNVM at 2 years after the start of the follow up | 0.839 | 40.40 3 |
[Post-treatment area of CNVM] = 1.171+ 1.403 × [pretreatment area of CNVM] − 1.344 × [LogMAR of pretreatment visual acuity] | |
| 0.898 | 33.15 8 |
[Post-treatment area of CNVM] = 0.445+ 1.133 × [pretreatment area of CNVM] | ||
| Change of area of CNVM | 0.538 | 6.924 | [Change of area of CNVM] = 315.7 −62.6 × [pretreatment area of CNVM] | |
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LogMAR of visual acuity = logarithm of the minimal angle resolution of visual acuity. CNVM = choroidal neovascular membrane.
