The data herein presented or reviewed indicate that the prevalence of concomitants or complications of diabetes such as hypertension, obesity, retinopathy, neuropathy, etc. may vary greatly from clinic to clinic. Though variable diagnostic criteria, observer error, ethnic or national differences may account for some of the disparity, selection of patients through death, economic factors, etc., which results in clinic rosters which are not representative of the total diabetic population also plays a role of undetermined significance. Hence definitive statements concerning the relative predisposition of males and females to concomitants or complications of diabetes must await standardization of population and criteria, data on incidence as well as prevalence, and expression of such data on a cumulative basis. Until then we can only speak of findings in limited populations because we have as yet no basis for intergroup comparisons.

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