Association between possible confounders and test results at 4-year follow-up
| Age | Sex (men vs women) | Education (low level vs high level) | Alcohol (excessive vs no) | Depression (yes vs no) | Psychotropic drugs (yes vs no) | |||||||
| OR | 95% CI | OR | 95% CI | OR | 95% CI | OR | 95% CI | OR | 95% CI | OR | 95% CI | |
| MMSE | 1.05 | 1.01 to 1.09 | 1.92 | 1.20 to 3.08 | 8.62 | 5.71 to 12.99 | 1.55 | 1.03 to 2.33 | 1.27 | 0.61 to 2.62 | 1.43 | 0.83 to 2.48 |
| WPTd | 1.06 | 1.02 to 1.10 | 1.94 | 1.26 to 2.99 | 4.41 | 3.10 to 6.25 | 1.29 | 0.87 to 1.93 | 1.49 | 0.74 to 3.00 | 1.75 | 1.02 to 3.02 |
| WPTe | 1.08 | 1.04 to 1.13 | 2.06 | 1.28 to 3.29 | 3.52 | 2.44 to 5.05 | 0.99 | 0.64 to 1.51 | 0.68 | 0.30 to 1.54 | 1.88 | 1.09 to 3.26 |
| BVRT | 1.09 | 1.04 to 1.14 | 1.49 | 0.87 to 2.55 | 7.52 | 4.57 to 12.35 | 1.48 | 0.92 to 2.35 | 1.42 | 0.62 to 3.24 | 1.73 | 0.95 to 3.16 |
| FWT | 1.05 | 1.01 to 1.09 | 1.69 | 1.13 to 2.53 | 1.27 | 0.91 to 1.78 | 0.83 | 0.55 to 1.25 | 1.00 | 0.47 to 2.13 | 1.28 | 0.73 to 2.24 |
| TMT | 1.16 | 1.10 to 1.22 | 1.69 | 0.94 to 3.04 | 7.69 | 4.48 to 13.16 | 1.40 | 0.85 to 2.30 | 1.43 | 0.60 to 3.41 | 1.43 | 0.74 to 2.76 |
| IST | 1.05 | 1.01 to 1.10 | 2.26 | 1.32 to 3.86 | 8.47 | 5.35 to 13.33 | 2.22 | 1.45 to 3.38 | 1.15 | 0.52 to 2.52 | 1.51 | 0.85 to 2.70 |
| FTTp | 1.08 | 1.04 to 1.13 | 0.49 | 0.32 to 0.74 | 2.67 | 1.85 to 3.86 | 1.46 | 0.96 to 2.24 | 1.52 | 0.70 to 3.29 | 1.68 | 0.95 to 2.98 |
| FTTnp | 1.09 | 1.04 to 1.14 | 0.42 | 0.27 to 0.64 | 2.09 | 1.42 to 3.07 | 1.54 | 0.99 to 2.39 | 1.32 | 0.59 to 2.95 | 1.64 | 0.91 to 2.95 |
| STg | 1.08 | 1.04 to 1.13 | 0.97 | 0.61 to 1.54 | 3.21 | 2.15 to 4.76 | 1.39 | 0.88 to 2.20 | 1.13 | 0.49 to 2.62 | 1.72 | 0.96 to 3.08 |
| STb | 1.06 | 1.02 to 1.11 | 1.22 | 0.79 to 1.88 | 1.74 | 1.22 to 2.49 | 1.49 | 0.97 to 2.28 | 0.73 | 0.32 to 1.67 | 1.27 | 0.72 to 2.24 |
| WST | 1.13 | 1.04 to 1.23 | 2.39 | 0.71 to 8.00 | 4.85 | 1.95 to 12.05 | 1.22 | 0.51 to 2.93 | 1.31 | 0.30 to 5.75 | 1.06 | 0.31 to 3.59 |
ORs were calculated with univariate logistic regression analysis, with independent variables being performances on the tests, dichotomised according to the 25th/75th percentile of their distribution (mentioned in table 3). Age was considered as a continuous variable.
BVRT, Benton Visual Retention Test; FTTnp, Finger Tapping Test non-preferred hand; FTTp, Finger Tapping Test preferred hand; IST, Isaacs Set Test; MMSE, Mini-Mental State Examination; STb, Stroop bad answers; STg, Stroop good answers; TMT, Trail Making Test; WPTd, Wechsler Paired Test difficult items; WPTe, Wechsler Paired Test easy items; WST, Wechsler Similarities Test.