TABLE 3.
Pre- and Postoperative Neurocognitive Performances
| Preoperative | Postoperative | |||||
|---|---|---|---|---|---|---|
| Domain and test | N | z-Score Mdn (IQR) | N | z-Score Mdn (IQR) | P a | Effect Sizeb |
| Attention | ||||||
| Digit span | 15 | −0.33 (1.33) | 15 | −0.33 (2.00) | .178 | .35 |
| Arithmetic | 15 | −0.33 (1.34) | 14 | −0.50 (2.00) | .322 | .26 |
| Learning and memory | ||||||
| HVLT-R TR | 15 | −1.79 (1.79) | 15 | −2.41 (2.89) | .053 | .50 |
| HVLT-R DR | 15 | −1.94 (3.60) | 15 | −2.88 (4.09) | .052 | .50 |
| HVLT-R Rec | 15 | −1.00 (1.82) | 15 | −2.71 (2.73) | .035 | .54 |
| Processing speed | ||||||
| Coding | 15 | −0.33 (1.66) | 15 | −0.67 (2.33) | .065 | .48 |
| Symbol Search | 14 | −0.33 (2.67) | 14 | −1.00 (2.33) | .171 | .37 |
| TMTA | 15 | 0.39 (1.15) | 15 | −0.30 (2.22) | .020 | .60 |
| Executive function | ||||||
| TMTB | 15 | −0.20 (1.68) | 15 | −1.10 (4.95) | .020 | .60 |
| Similarities | 15 | 0.00 (0.67) | 13 | −0.67 (1.83) | .013 | .69 |
| COWA | 15 | −1.14 (1.75) | 15 | −2.10 (2.26) | .013 | .64 |
| Animals | 15 | −1.30 (2.30) | 14 | −1.85 (2.73) | .181 | .36 |
| Language | ||||||
| Token | 15 | 0.44 (1.05) | 14 | −0.44 (2.15) | .008 | .71 |
| Naming | 15 | −1.60 (1.10) | 15 | −1.30 (2.50) | .699 | .10 |
| Visuospatial function | ||||||
| Block Design | 15 | 0.00 (1.33) | 14 | −0.17 (1.42) | .645 | .12 |
| CTB COMP | 15 | −1.24 (1.60) | 15 | −2.30 (1.95) | .005 | .72 |
See Table 1 for test name abbreviations.
aPre- and postoperative z-scores compared with matched pairs Wilcoxon signed-rank tests.
bEffect size (r) calculated as the absolute (positive) standardized test statistic (Z) divided by the square root of the number of pairs.
Bolded; significant difference, P ≤ .05.