Table 3.
Percentile estimates for an 80-year-old male with 12 years of education
| Test | Score | Z all | Q all | Z gender | Q gender | Z education | Q education | Z age | Q age |
|---|---|---|---|---|---|---|---|---|---|
| Boston naming test | 25 | 41 | 27 | 23 | 10 | 33 | 21 | 43 | 29 |
| Category fluency: Animals | 9 | 7 | 4 | 2 | 1 | 4 | 2 | 5 | 2 |
| Category fluency: Vegetables | 7 | 14 | 9 | 7 | 3 | 4 | 2 | 5 | 2 |
| Digit span backward | 4 | 19 | 17 | 10 | 4 | 12 | 5 | 16 | 12 |
| Digit span backward: longest sequence | 3 | 11 | 7 | 6 | 1 | 8 | 1 | 10 | 2 |
| Digit span forward | 6 | 16 | 17 | 9 | 5 | 12 | 7 | 16 | 14 |
| Digit span forward: longest sequence | 5 | 9 | 3 | 5 | 2 | 6 | 2 | 9 | 3 |
| Digit span forward | 6 | 16 | 17 | 9 | 5 | 12 | 7 | 16 | 14 |
| Digit span forward: longest sequence | 5 | 9 | 3 | 5 | 2 | 6 | 2 | 9 | 3 |
| Logical memory A delayed | 7 | 13 | 15 | 6 | 5 | 6 | 6 | 8 | 7 |
| Logical memory A immediate | 6 | 20 | 23 | 12 | 15 | 10 | 12 | 13 | 14 |
| MMSE | 27 | 22 | 23 | 11 | 8 | 10 | 10 | 14 | 14 |
| Trail making: A | 3.37 | 82 | 79 | 58 | 52 | 74 | 72 | 71 | 68 |
| Trail making: B | 4.43 | 73 | 69 | 43 | 38 | 60 | 56 | 62 | 58 |
| WAIS digit symbol | 52 | 92 | 90 | 67 | 65 | 79 | 81 | 76 | 75 |
Abbreviations: MMSE, mini-mental state examination; WAIS, Wechsler adult intelligence scale.
NOTE. Mean regression with z-score method and quantile regression are indicated by Z and Q. All, gender, education, and age represent models with all three variables, gender only, education only, or age only as the predictors.