Table 2.
Cognitive outcomes descriptive and inferential statistics
| Cognitive test | Condition | Mean ± SD | Median (IQR) | Omnibus Test |
|---|---|---|---|---|
| WMS-IV: Logical Memory I scaled score | DBS-OFF | 14.6 ± 2.41 | 14.5 (13, 16) | χ2 = 0.6 p = 0.89 |
| DBS-LEFT | 14.6 ± 2.63 | 14.5 (13, 17) | ||
| DBS-RIGHT | 14.8 ± 1.99 | 15 (14, 16) | ||
| DBS-BILATERAL | 15.2 ± 2.49 | 16 (14, 17) | ||
| WMS-IV: Logical Memory II scaled score | DBS-OFF | 15.9 ± 2.56 | 16 (15, 18) | χ2 = 1.8 p = 0.62 |
| DBS-LEFT | 15.7 ± 2.21 | 15.5 (15, 18) | ||
| DBS-RIGHT | 16.4 ± 1.96 | 16.5 (16, 18) | ||
| DBS-BILATERAL | 15.8 ± 3.36 | 17 (15, 18) | ||
| WMS-IV: Design Content I scaled score | DBS-OFF | 13.7 ± 3.27 | 14.5 (11, 16) | χ2 = 2.03 p = 0.57 |
| DBS-LEFT | 14.7 ± 3.86 | 15.5 (11, 18) | ||
| DBS-RIGHT | 13.8 ± 4.16 | 15 (9, 17) | ||
| DBS-BILATERAL | 14 ± 4.16 | 15 (13, 16) | ||
| WMS-IV: Design Content I Iscaled score | DBS-OFF | 14.1 ± 3.25 | 14.5 (13, 16) | χ2 = 0.95 p = 0.81 |
| DBS-LEFT | 14.5 ± 5.08 | 17 (9, 19) | ||
| DBS-RIGHT | 14.2 ± 4.08 | 12.5 (11, 19) | ||
| DBS-BILATERAL | 14.6 ± 4.03 | 13.5 (11, 19) | ||
| WMS -IV: Design Spatial I scaled score | DBS-OFF | 12.1 ±3.45 | 12 (10, 15) | χ2 = 2.8 p = 0.42 |
| DBS-LEFT | 12.8 ± 1.55 | 13 (12, 14) | ||
| DBS-RIGHT | 12.1 ± 3.54 | 11.5 (9, 16) | ||
| DBS-BILATERAL | 12.8 ± 2.7 | 13 (11, 14) | ||
| WMS-IV: Design Spatial I Iscaled score | DBS-OFF | 13.2 ± 3.29 | 13 (11, 15) | χ2 = 2.6 p = 0.45 |
| DBS-LEFT | 13.9 ±2.42 | 13 (13, 15) | ||
| DBS-RIGHT | 14.3 ± 2.79 | 15 (12, 16) | ||
| DBS-BILATERAL | 15.1 ± 3.38 | 15.5 (13, 18) | ||
| Stockings of Cambridge: Problems solved in minimum moves | DBS-OFF | 9.9 ± 2.28 | 11 (9, 11) | χ2 = 1.6 p = 0.67 |
| DBS-LEFT | 9.4 ± 2.59 | 10 (7, 12) | ||
| DBS-RIGHT | 10.4 ± 0.7 | 10.5 (10, 11) | ||
| DBS-BILATERAL | 10.3 ± 1.95 | 11 (10, 12) | ||
| Stockings of Cambridge: Mean moves for a 4 move problem | DBS-OFF | 4.8 ± 1.09 | 4 (4, 5) | χ2 = 1.6 p = 0.67 |
| DBS-LEFT | 4.9 ± 0.94 | 4.8 (4, 6) | ||
| DBS-RIGHT | 4.4 ± 0.59 | 4 (4, 5) | ||
| DBS-BILATERAL | 4.8 ±0.9 | 4.9 (4, 5) | ||
| Spatial Span: Span length | DBS -OFF | 5.8 ± 1.4 | 5.5 (5, 7) | χ2 = 5.4 p = 0.15 |
| DBS-LEFT | 6 ± 1.33 | 6 (5, 7) | ||
| DBS-RIGHT | 6.3 ± 1.49 | 6.5 (5, 8) | ||
| DBS-BILATERAL | 5.7 ± 1.42 | 5.5 (5, 6) | ||
| Spatial Span: Total Errors | DBS-OFF | 13.4 ± 6.62 | 13.5 (6, 19) | χ2 = 5.2 p = 0.16 |
| DBS-LEFT | 13.5 ± 4.38 | 13 (10, 18) | ||
| DBS-RIGHT | 13.4 ± 5.02 | 14 (11, 16) | ||
| DBS-BILATERAL | 11.1 ± 4.82 | 10 (8, 13) |
SD, standard deviation; IQR, inter quartile range; WMS, Wechsler Memory Scale;