Table 3 Changes in Contrast Sensitivity (Log CS) at Different Levels of Illumination Ω
Level of Illumination | Normal (100%) | Low (4%) | Very Low (0.1%) | |||
|---|---|---|---|---|---|---|
Covariates§ | Coefficient¶ (95% CI) | P value | Coefficient (95% CI) | P value | Coefficient (95% CI) | P value |
Treatment†| 0.0154 (-0.0164,0.0471) | 0.342 | 0.0408 (-0.0273,0.1089) | 0.241 | -0.0184 (-0.0545, 0.0176) | 0.316 |
Period | 0.0351 (0.0025,0.0677) | 0.035 | 0.0014 (-0.0853,0.0880) | 0.975 | -‡ | - |
Time†(number of weeks) | 0.0008 (-0.0008, 0.0025) | 0.313 | 0.0001 (-0.0034, 0.0037) | 0.934 | -0.0009 (-0.0024,0.0006) | 0.237 |
Age | -‡ | - | -0.0049 (-0.0061,-0.0038) | <0.001 | - | - |
Vitamin A Use | - | - | - | - | - | - |
Iris color | - | - | - | - | - | - |
Period × Treatment | - | - | - | - | - | - |
Treatment × Time | - | - | - | - | - | - |
Period × Time | - | - | -0.0028 (-0.0055,-0.0001) | 0.042 | - | - |
Baseline Log CS | 0.9865 (0.9289, 1.0440) | <0.001 | 0.9451 (0.8496, 1.0406) | <0.001 | 0.9721 (0.9003,1.0440) | <0.001 |
Intercept | 0.0133 (-0.0705, 0.0971) | 0.755 | 0.2781 (0.1374,0.4188) | <0.001 | 0.459 (-0.0119, 0.1037) | 0.119 |