Table 4.

Performance on discursive measures related to “speech rate and speech sound errors” and “other disruptions to fluency” by diagnostic group.

	CBS (n = 14)	CBS-Non-AD (n = 10)	CBS-AD (n = 4)	CG (n = 15)	CBS vs. CG p-Value	CBS-Non-AD vs. CBS-AD vs. CG p-Value
Speech rate and speech sound errors
Number of words	53.4 (22.5)	48.5 (25.1)	65.5 (6.2)	72.9 (27.3)	0.051	0.065
Speech prod rate	0.8 (0.2)	0.8 (0.2)	0.9 (0.3)	1.4 (0.3)	<0.001	<0.001 a
Phon paraphasias phw	0.0 (0.0)	0.0 (0.0)	0.0 (0.0)	0.0 (0.0)	--	---
Distortions phw	4.2 (9.0)	5.4 (10.5)	1.2 (1.4)	0.0 (0.3)	0.077	0.058
Other disruptions to fluency
False starts phw	2.1 (3.0)	1.73 (3.5)	3.0 (1.1)	1.8 (2.6)	0.847	0.109
Repaired sequences phw	8.1 (6.5)	7.5 (6.6)	9.6 (7.2)	5.5 (3.3)	0.505	0.652
Filled pauses phw	1.8 (2.0)	1.3 (2.0)	3.0 (1.7)	0.7 (1.4)	0.146	0.024 b
Incomplete sentences phw	4.0 (6.1)	3.4 (6.7)	4.1 (4.3)	0.6 (1.2)	0.089	0.120

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; SD = standard deviation, s = seconds, speech prod rate = speech production rate, and Phon paraphasias = phonological paraphasias.