Table 6.
Performance on discursive measures related to “syntactic structure and complexity” 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 |
|
|---|---|---|---|---|---|---|
| Number of utterances | 11.1 (4.2) | 10.4 (4.6) | 12.8 (3.0) | 12.7 (4.2) | 0.331 | 0.284 |
| Number of sentences | 8.6 (5.0) | 7.9 (5.6) | 10.2 (3.2) | 8.8 (4.4) | 0.652 | 0.464 |
| Embeddings phw | 0.7 (1.2) | 0.1 (0.5) | 2.2 (1.3) | 2.4 (1.8) | 0.020 | 0.003 a |
| Mean length of sentences | 5.6 (1.4) | 5.5 (1.3) | 5.7 (1.7) | 6.4 (2.8) | 0.172 | 0.376 |
| Proportion of sentences | 0.7 (0.2) | 0.7 (0.2) | 0.8 (0.2) | 0.6 (0.2) | 0.270 | 0.457 |
| Syntax production rate | 0.8 (0.2) | 0.8 (0.1) | 0.8 (0.2) | 0.7 (0.2) | 0.747 | 0.815 |
| Morphosyntactic errors phw | 0.0 (0.0) | 0.0 (0.0) | 0.0 (0.0) | 0.0 (0.0) | 0.652 | 0.699 |
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, 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.