Table 4. Correlations Between Neuropsychological Performance and Off UPDRS Motor Scores [r (p value)].
| Bradykinesia | Rigidity | Tremor | Speech/Facial Expression | Posture/Balance/Gait | |
|---|---|---|---|---|---|
| BTA (number correct responses) | -0.27 (< 0.01) | -0.22 (0.04) | -0.06 (0.57) | -0.20 (0.05) | -0.32 (< 0.01) |
| COWAT (number of words produced) | -0.14 (0.19) | -0.19 (0.06) | 0.12 (0.25) | -0.14 (0.19) | -0.11 (0.30) |
| RULIT (learning: total number correct) | -0.22 (0.04) | -0.10 (0.36) | 0.03 (0.75) | -0.28 (< 0.01) | -0.33 (< 0.01) |
| RULIT (immed. memory: number correct) | -0.18 (0.08) | -0.1 (0.32) | 0.0496 (0.64) | -0.28 (< 0.01) | -0.26 (0.01) |
| RULIT (delayed memory: number correct) | -0.28 (< 0.01) | -0.18 (0.08) | -0.12 (0.27) | -0.22 (0.03) | -0.34 (< 0.01) |
| CAL (trials to criterion) | 0.27 (<0.01) | 0.18 (0.08) | 0.03 (0.78) | 0.05 (0.62) | 0.39 (< 0.01) |
| SOC (5 move problems: initial thinking time) | 0.14 (0.20) | -0.00 (0.99) | -0.07 (0.54) | -0.03 (0.78) | 0.023 (0.80) |
| SOC (5 move problems: subsequent thinking time) | 0.17 (0.11) | 0.21 (0.05) | -0.00 (0.95) | 0.07 (0.50) | 0.29 (< 0.01) |
| SOC (number solved in minimum moves) | -0.02 (0.85) | -0.13 (0.20) | -0.01 (0.92) | -0.31 (< 0.01) | -0.28 (< 0.01) |
| SOC (number of moves to solve problem) | 0.02 (0.87) | 0.09 (0.41) | 0.09 (0.37) | 0.16 (0.12) | 0.20 (0.05) |
| WCST (number categories completed) | -0.29 (< 0.01) | -0.36 (< 0.01) | 0.06 (0.59) | -0.31 (< 0.01) | -0.24 (0.02) |
| WCST (trials to complete first category) | 0.20 (0.06) | 0.42 (< 0.01) | 0.03 (0.77) | 0.15 (0.14) | 0.19 (0.07) |
| WCST (number of perseverative errors) | 0.19 (0.07) | 0.38 (< 0.01) | -0.07 (0.53) | 0.27 (< 0.01) | 0.18 (0.08) |
| WCST (number of nonperseverative errors) | 0.28 (< 0.01) | 0.24 (0.02) | -0.03 (0.76) | 0.20 (0.06) | 0.25 (0.02) |
| SWM (between search errors 4 boxes) | 0.24 (0.02) | 0.13 (0.21) | -0.11 (0.31) | 0.18 (0.09) | 0.35 (< 0.01) |
| SWM (between search errors 6 boxes) | 0.33(< 0.01) | 0.20 (0.06) | -0.05 (0.63) | 0.33 (< 0.01) | 0.46 (<0.01) |
| SWM (between search errors 8 boxes) | 0.17 (0.10) | 0.16 (0.12) | -0.15 (0.16) | 0.32 (< 0.01) | 0.41 (<0.01) |
BTA = Brief Test of Attention; RULIT = Ruff-Light Trail Learning Test; CAL = Conditional Associative Learning Test; SOC = Stockings of Cambridge
WCST = Wisconsin Card Sorting Test; SWM = Spatial Working Memory Test. Statistically significant relationships are shown in bold font.