Table 2.
Cognitive functioning among cases and controls
| Test | Cases with dementia and TBI (mean rank) | Cases with dementia and no TBI (mean rank) | Mann-Whitney U | p | Effect size (r = Z/√N) |
|---|---|---|---|---|---|
| MMSE1 | 492.58 | 452.99 | 87491.5 | 0.035 | 0.07 |
| Logical Memory IA | 434.46 | 387.11 | 64880.0 | 0.006* | 0.10 |
| Logical Memory IIA | 431.28 | 379.70 | 61984.5 | 0.001* | 0.11 |
| Category Fluency (Animals) | 452.23 | 407.81 | 71894.0 | 0.012* | 0.09 |
| Trails A | 362.41 | 385.21 | 59774.0 | 0.173 | – |
| Trails A (# correct lines) | 167.73 | 154.49 | 10343.0 | 0.063 | – |
| Trails B | 265.23 | 293.69 | 32467.5 | 0.043 | 0.09 |
| Trails B (# correct lines) | 131.77 | 113.26 | 5588.0 | 0.025 | 0.15 |
| Boston Naming Test | 415.52 | 406.38 | 73510.5 | 0.600 | – |
|
| |||||
| Test | Cases with dementia and TBI (mean (SD)) | Cases with dementia and no TBI (mean (SD)) | t(df) | P | Cohen’s d |
|
| |||||
| WAIS-R2 Digit Symbol | 24.65 (12.41) | 23.91 (14.55) | 0.598 (473) | 0.550 | – |
| Digit Span Forward | 6.46 (2.45) | 6.51 (2.43) | 0.249 (561) | 0.804 | – |
| Digit Span Backward | 4.18 (2.52) | 4.04 (2.07) | 0.764 (556) | 0.445 | – |
*
p ≤ 0.012.
1
MMSE = Mini Mental State Examination.
2
WAIS-R = Wechsler Adult Intelligence Scale, Revised.