Expressive vocal behavior and the severity of coronary artery disease.

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Abstract
This study sought to ascertain the relationship of expressive vocal behavior in a structured interview and the severity of coronary artery disease in a group of 79 patients referred for coronary angiography. One half of the structured interview was administered in a nonchallenging manner, the other half in a moderately challenging manner. In patients age 60 and younger, two speech measures derived from the nonchallenging interview, a computer-scored index of the frequency of simultaneous speech and judged loudness level, accounted for 38% of the variance in the patients'' severity of stenosis scores, when the latter was indexed by the Gensini method. The same speech indices derived from the challenging interview segment accounted for only 18% of the variance on the patients'' Gensini scores. In the older patient group, only one speech variable, speech rate in the nonchallenging interview segment, contributed to the patients'' Gensini scores. The findings suggest a) that in younger patients objective, computer-scorable, speech variables correlate significantly with severity of coronary occlusion, and b) that it is not essential that these speech indices be derived from a structured interview that is administered in a challenging and provocative manner. In the present study, there were no significant correlations between the participants'' global TABP scores and their occlusion scores.