Diabetic Gangrene in Black Patients

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Abstract
We reviewed diabetic gangrene in 104 American blacks and found that the clinical features were similar to those reported for the general diabetic population. We observed, however, that there was a significant association of hypertension with above-knee and bilateral amputations in our patients (P less than .001 and .01, respectively), and that the mean blood pressure of the bilateral amputees (124.5 +/- 3.8 mm Hg) (SEM) was significantly higher (P less than .005) than that of the unilateral amputees (114.4 +/- 1.7 mm Hg). There results suggest a strong association of hypertension with far-advanced occlusive vascular disease of the lower limbs. Moderately severe anemia (hematocrit 20% to 30%) was associated significantly with primary above-knee amputation and mortality (P less than .02 and .05, respectively). Mortality resulted mostly from mixed causes (cardiopulmonary failure, uremia, sepsis, diabetic coma). The dead patients had significantly increased prevalence of cardiac disease (P less than .02), higher frequency of above-knee amputation (P less than .01), and a duration of diabetes (17.4 +/- 2.8 years) significantly longer (P less than .025) than that of the surviving patients (12.0 +/- 1.0 years).

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