Table 3 Power of the study to detect significant differences using a relative risk of 0.5
% in standard care group losing 3 or more lines of visual acuity over 12 months | Power to detect RR of 0.5 |
|---|---|
10% | 0.35 |
20% | 0.58 |
30% | 0.81 |
40% | 0.94 |
50% | 0.99 |
60% | 1 |
70% | 1 |
80% | 1 |
90% | 1 |