Human isophane or lente insulin? A double blind crossover trial in insulin dependent diabetes mellitus.

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Abstract
Fifty two children with insulin dependent diabetes mellitus were randomised to receive human isophane or lente insulin preparations in combination with soluble insulin in a double blind trial. Patients were seen every two months, and crossed over after four months of treatment. Control assessed by glycated hemoglobin was significantly lower in children on human isophane insulin, but fasting blood glucose and fructosamine concentrations and the number of episodes of hypoglycemia were similar on both regimens. In five children on twice daily insulin regimen, insulin profiles throughout a 24 hour period demonstrated greater variability on lente compared with iosphane insulin despite identically administered insulin doses. A questionnaire completed at the end of the study showed that two thirds of the children and/or their parents preferred the isophane insulin, and they gave perceived improvement of metabolic control as the major reason for their choice.