Table 3.
Mean and standard deviations (SD) of the pre-surgical and post-surgical scores for the dystonia patients on the measures of cognitive function
| Measure | Pre-surgery mean (SD) | Post-surgery mean (SD) | p value |
|---|---|---|---|
| Mini mental state examination (max = 30) | 27.20 (2.90) | 27.60 (2.32) | 0.343 |
| WAIS-R subtests | |||
| Digit span | 10.42 (3.31) | 7.92 (3.89) | 0.024* |
| Similarities | 12.33 (3.55) | 10.83 (3.24) | 0.124 |
| Vocabulary | 9.92 (3.55) | 10.17 (3.46) | 0.699 |
| Verbal IQ (prorated) | 103.73 (14.02) | 93.36 (11.96) | 0.094 |
| RAVLT | |||
| Correct recall: Trial 1 (max 15) | 5.79 (2.36) | 5.71 (3.02) | 0.932 |
| Correct recall: Trial 5 (max 15) | 12.64 (2.02) | 11.00 (3.61) | 0.022* |
| Recall intrusions | 0.79 (0.97) | 0.93 (1.33) | 0.699 |
| Recall repetitions | 0.93 (1.21) | 0.64 (1.15) | 0.470 |
| Recognition: total correct (max 15) | 14.36 (1.27) | 13.43 (2.31) | 0.084 |
| Recognition: false positives | 0.86 (1.09) | 1.36 (2.37) | 0.390 |
| Short recognition memory for faces | |||
| Total correct (max 25) | 23.86 (1.41) | 24.07 (2.20) | 0.664 |
| Subject-ordered pointing | |||
| 4 items (mean errors) | 0.10 (0.32) | 0.40 (0.52) | 0.081 |
| 8 items (mean errors) | 1.60 (0.97) | 1.10 (0.88) | 0.244 |
| 12 items (mean errors) | 2.10 (1.60) | 2.20 (1.03) | 0.853 |
| Verbal fluency total words generated | |||
| Letter fluency | 41.85 (18.49) | 39.85 (15.89) | 0.457 |
| Category fluency | 15.23 (5.49) | 16.00 (6.05) | 0.409 |
| Category switching fluency | 18.49 (5.13) | 15.89 (4.40) | 0.673 |
| Graded naming test | |||
| Total correct (max 30) | 19.29 (4.84) | 20.07 (5.56) | 0.085 |
| Modified Wisconsin card sorting | |||
| Categories correctly sorted (max = 6) | 5.73 (1.27) | 5.73 (0.65) | 1.00 |
| Total errors | 7.17 (5.22) | 4.75 (3.77) | 0.115 |
| Perseverative errors | 1.58 (1.62) | 2.08 (3.03) | 0.568 |
| Non-perseverative errors | 5.50 (4.36) | 1.92 (1.98) | 0.016* |
| Stroop | |||
| Control colour naming time(ms) | 76.43 (21.54) | 81.1 (25.12) | 0.436 |
| Control colour naming number of errors | 1.38 (1.71) | 0.38 (0.65) | 0.02* |
| Stroop interference time(ms) | 126.47 (44.61) | 144.21 (50.59) | 0.107 |
| Stroop interference numbers of errors | 2.61 (4.03)) | 1.84 (4.91) | 0.471 |
| Difference score in completion time (ms) | 50.04 (30.52) | 63.14 (31.98) | 0.168 |
| Trails A and B | |||
| Trails A: completion time (ms) | 57.24 (33.43) | 61.61 (36.76) | 0.409 |
| Trails B: completion time (ms) | 115.17 (78.26) | 116.38 (66.6) | 0.952 |
| Difference Trail B−A (ms) | 57.93 (65.87) | 54.76 (48.25) | 0.886 |
| PASAT | |||
| Total errors (max 30) | 6.55 (8.39) | 14.56 (13.45) | 0.02* |
*p < 0.05