Plasma calcium and phosphate levels in an adult noninsulin-dependent diabetic population

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Abstract
Duplicate or triplicate measurements of fasting plasma glucose, calcium (Ca), phosphate (Pi), and glycosylated hemoglobins were performed on a group of non-insulin dependent diabetic patients and controls at 3–6 month intervals. In the diabetic group (48 males and 44 females), 18 were on diet only, 21 on diet and oral hypoglycemic treatment, and 51 on diet and insulin. These were a total of 217 measurements for each parameter. Results were compared to 416 measurements obtained from sex and age-matched controls. Plasma Ca levels were higher in the diabetic group (2.48±0.004 vs 2.38±0.006 mmol/liter)P<0.001; plasma Pi levels were similar to those of controls. The difference in plasma Ca was not influenced by age, sex, or mode of treatment. No correlation was found in the three treatment groups between plasma Ca and duration of diabetes nor with patients' weights. The results are consistent with the view that an alteration in calcium homeostasis accompanies the diabetic state.