Table 5.
Performance on discursive measures related to “lexical-semantic level” by diagnostic group.
| CBS (n = 15) |
CBS-Non-AD (n = 11) |
CBS-AD (n = 4) |
CG (n = 15) |
CBS vs. CG p-Value |
CBS-Non-AD vs. CBS-AD vs. CG p-Value |
|
|---|---|---|---|---|---|---|
| Open-class proportion | 0.7 (0.1) | 0.7 (0.1) | 0.6 (0.1) | 1.0 (0.2) | <0.001 | 0.002 ab |
| Verb proportion | 0.4 (0.1) | 0.4 (0.1) | 0.4 (0.0) | 0.4 (0.0) | 0.813 | 0.378 |
| Lexical-semantic errors phw | 4.4 (5.9) | 3.7 (5.4) | 6.3 (7.6) | 0.7 (1.5) | 0.012 | 0.013 b |
| % CIU | 72.4 (17.3) | 73.8 (16.9) | 68.9 (20.2) | 84 (6.9) | 0.037 | 0.101 |
Note: Comparison analysis was first performed between CBS vs. CG and then performed between CBS-non-AD vs. CBS-AD vs. CG with Student’s t-test/ANOVA or the Mann–Whitney/Kruskal–Wallis test. Data are reported as the mean (SD); p is significant at the 0.05 level; a = CBS-non-AD vs. CG p-value > 0.05, b = CBS-AD vs. CG p-value > 0.05, c = CBS-non-AD vs. CBS-AD p-value > 0.05. Bold-faced values are statistically significant according to p values. Abbreviations: phw = per hundred words, CIU = correct information units, CBS = corticobasal syndrome patients, CBS-non-AD = corticobasal syndrome not related to Alzheimer’s disease patients, CBS-AD = corticobasal syndrome related to Alzheimer’s disease patients, and SD = standard deviation.