Table 2.
Summary statistics for all core and derived variables
| Neuropsychological test and derived scores | M | SD | Minimum | Maximum | 25th Percentile | 50th Percentile | 75th Percentile |
|---|---|---|---|---|---|---|---|
| Trail making test part A, time (s) | 31.02 | 12.24 | 9.00 | 148.00 | 23.00 | 28.00 | 36.00 |
| Trail making test part B, time (s) | 80.26 | 39.19 | 24.00 | 300.00 | 55.00 | 71.00 | 93.00 |
| Trail making test, raw difference score (s) | 49.25 | 33.49 | −15.00 | 266.00 | 28.00 | 41.00 | 60.00 |
| Trail making test, ratio score | 2.67 | 1.01 | 0.80 | 9.96 | 2.00 | 2.46 | 3.06 |
| Animals, in 60 s | 21.66 | 5.65 | 7.00 | 49.00 | 18.00 | 21.00 | 25.00 |
| Vegetables, in 60 s | 14.95 | 4.07 | 1.00 | 31.00 | 12.00 | 15.00 | 18.00 |
| Phonemic fluency, F trial | 14.59 | 4.42 | 1.00 | 35.00 | 12.00 | 14.00 | 17.00 |
| Phonemic fluency, L trial | 13.80 | 4.25 | 3.00 | 30.00 | 11.00 | 14.00 | 17.00 |
| Difference between semantic and phonemic fluency | 8.32 | 8.64 | −22.00 | 38.00 | 2.00 | 8.00 | 14.00 |
| Craft story, immediate verbatim units | 21.81 | 6.49 | 2.00 | 40.00 | 17.00 | 22.00 | 26.00 |
| Craft story, delayed verbatim units | 19.02 | 6.55 | 1.00 | 40.00 | 14.00 | 19.00 | 24.00 |
| Percentage of Craft story retained | 87.47 | 18.26 | 6.25 | 266.70 | 76.92 | 88.00 | 97.22 |
| Benson figure, copy trial | 15.64 | 1.25 | 5.00 | 17.00 | 15.00 | 16.00 | 17.00 |
| Benson figure, delayed trial | 11.51 | 2.92 | 0.00 | 17.00 | 10.00 | 12.00 | 14.00 |
| Percentage of Benson figure retained | 73.60 | 18.03 | 0.00 | 121.40 | 62.50 | 75.00 | 87.50 |
| Difference between percentage of craft story and Benson figure retained | 13.87 | 23.42 | −63.33 | 204.20 | −1.92 | 12.73 | 27.75 |
| Trail making test part A commission errors | 0.16 | 0.70 | 0.00 | 21.00 | 0.00 | 0.00 | 0.00 |
| Trail making test part B commission errors | 0.57 | 1.09 | 0.00 | 19.00 | 0.00 | 0.00 | 1.00 |
| F words repeated | 0.60 | 0.97 | 0.00 | 10.00 | 0.00 | 0.00 | 1.00 |
| Non-F words and rule violations | 0.36 | 0.87 | 0.00 | 15.00 | 0.00 | 0.00 | 0.00 |
| L words repeated | 0.63 | 0.92 | 0.00 | 6.00 | 0.00 | 0.00 | 1.00 |
| Non-L words and rule violations | 0.26 | 0.64 | 0.00 | 9.00 | 0.00 | 0.00 | 0.00 |
| Error index | 2.56 | 2.42 | 0.00 | 23.00 | 1.00 | 2.00 | 4.00 |
Note: N = 1803 for all analyses; values in boldface indicate the derived measures that were the focus of this study.