The Japan Journal of Logopedics and Phoniatrics

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The relation of age and sex to type and severity of aphasia was investigated in 585 aphasic patients, 96% of whom had had cerebrovascular accidents. The type of aphasia as well as the degree of language deficit in each patient was determined by the Test for Differential Diagnosis of Aphasia (The Roken Test) . The results were as follows: 1) Type of aphasia was closely related to the patients' age: i) The mean age of the various types of aphasic groups differed significantly; i. e., the mean age of the Broca's aphasic group was the lowest, followed by the conduction, amnesic, Wernicke's and lastly the global aphasic groups. ii) The frequency distribution of aphasic type changed systematically with an increase in age. iii) The presence or absence of a close relationship between advancing age and the incidence of certain aphasic types depended on the particular aphasic type; i. e., while the incidence of global aphasia increased with advancing age, that of Broca's and amnesic aphasia decreased with age. 2) Sex proved to have close relationship with aphasic type: i) The frequency distribution of aphasic type in male patients was diffrent from in female patients. ii) Age difference between Broca's and Wernicke's aphasic groups was highly significant in male patients. On the other hand, this tendency was not evident in female patients. 3) Severity of aphasia increased with advancing age.

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