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JAMA. 1947;135(13):831-835. doi:10.1001/jama.1947.02890130021009.
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The medical care of the aged group1 of persons is now attracting the attention of a growing number of physicians owing to the fact that today this group comprises a much larger proportion of the total population than it did several decades ago—at that time the life span was recognized as 50 years. At this figure the proportion was not large enough to present much of a problem. With the life expectancy now given at 65 years and rapidly rising to perhaps 70 years in a short time, the medical care of this group becomes of major importance.

There is no specific age at which the so-called senile changes develop, and there is no specific rule guiding the changes in the various organs and tissues of the body. They may begin any time after 30 years of age.

As age advances, the bones become more brittle from increase in


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