Abstract
A multivariate discriminate analysis of laboratory variables collected over a period of three to five years for 502 healthy male veterans showed that 5 variables (fasting blood glucose, blood glucose two hours following ingestion of 100 gm. of glucose, total serum protein, hemoglobin, and cholesterol esters) were changing significantly in the 222 subjects who were over 50 years of age on entry into this study. It took the combined effect of fifteen variables to predict any age change in the subgroup of 280 subjects who were 25–49 at time of entry. A further subgrouping of current cigarette smokers and those who had never smoked showed no significant difference in the laboratory data in either age cohort.
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