Table 1
Relations between psychometric tests and colour vision
| Dependent variable | Independent variables | Regression coefficient | 95% CI | p value |
|---|---|---|---|---|
| CI, confidence interval. | ||||
| *Benton visual retention test error score, Trail making A, and Trailing making B were log transformed before analysis. | ||||
| †Taking antilogs, regression coefficient is 2.25, 95% CI 1.39 to 3.63. | ||||
| ‡Taking antilogs, regression coefficient is 1.50, 95% CI 1.11 to 2.05. | ||||
| §Taking antilogs, regression coefficient is 1.47, 95% CI 1.06 to 2.05. | ||||
| Benton score | CCI | −1.97 | −3.21 to 0.72 | 0.002 |
| IQ | 0.05 | 0.02 to 0.08 | 0.002 | |
| Smoking | −0.40 | −1.08 to 0.08 | 0.249 | |
| Alcohol | 0.01 | −0.02 to 0.03 | 0.673 | |
| Constant | 4.46 | 0.51 to 8.41 | 0.027 | |
| Benton error score* | CCI† | 0.81 | 0.33 to 1.29 | 0.001 |
| IQ | −0.02 | −0.04 to 0.01 | <0.001 | |
| Smoking | 0.12 | −0.14 to 0.39 | 0.359 | |
| Alcohol | −0.004 | −0.01 to 0.01 | 0.429 | |
| Constant | 2.80 | 1.26 to 4.33 | 0.001 | |
| Trail A* (seconds) | CCI‡ | 0.41 | 0.10 to 0.72 | 0.010 |
| Age | 0.01 | 0.01 to 0.02 | 0.001 | |
| Smoking | −0.01 | −0.17 to 0.15 | 0.913 | |
| Alcohol | 0.003 | −0.003 to 0.01 | 0.357 | |
| Constant | 2.30 | 1.84 to 2.75 | <0.001 | |
| Trail B* (seconds) | CCI§ | 0.39 | 0.06 to 0.72 | 0.023 |
| Age | 0.02 | 0.01 to 0.03 | <0.001 | |
| Smoking | 0.09 | −0.08 to 0.26 | 0.295 | |
| Alcohol | 0.003 | −0.004 to 0.01 | 0.423 | |
| Constant | 2.78 | 2.29 to 3.28 | <0.001 | |
