The accuracy of drawing up insulin by insulin treated diabetics

The accuracy of drawing up insulin was tested in a group of randomly selected insulin requiring diabetics. The mean error between patients of drawing up rapid acting insulin was + 5.6%, of intermediate acting insulin, + 4.9% and of a mixture of rapid and intermediate acting insulin, + 1.8%. There was no correlation in percentage error in drawing up insulin the age of patient, duration of diabetes, dosage of insulin nor quality of diabetic control.