To the Editor: The report by Raskin and colleagues (Dec. 22 issue)* demonstrating that strict control of diabetes results in an improvement in the width of the skeletal-muscle capillary basement membrane is indeed provocative. When one analyzes the data, however, questions arise with regard to patient selection and statistical analysis of the width of the capillary basement membrane. First of all, Patient 6 in the experimental group (their Table 2) had a much more thickened capillary basement membrane (3480 Å) than the other 12 subjects in the group. Since this patient's value was notably different from everyone else's, it would.
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