449 hospital patients with no pathologic brain CT findings, 30 yrs of age or older, were selected for the study of cerebral atrophy during the 30 months, from January 1980 to June 1983, at dept. of internal medicine, Hanyang Univ. hospital & following results were obtained.
1) Those in male group, A gradually progressive increase in the degree of cerebral atrophy score in the 3rd, 4th & late 5th decades was followed by a dramatic increase in the late 6th & 7th decades.
2) Those in female group, A gradually progressive increase in the degree of cerebral atrophy score from 3rd decade to 7th decade was noted.
3) The difference of the degree of cerebral atrophy score between male & female group, from 4th to 7th decade, was not statistically significant (P 0.05).
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