Diabetic control was poor if the frequency of bad results of blood glucose was more than 25% in the most recent year (bad = fasting blood glucose of venous plasma .7.0 mmol/L, or postprandial blood glucose of venous plasma .10.0 mmol/L, or fasting blood glucose of capillary whole blood .8.0 mmol/L, or postprandial blood glucose of capillary whole blood .11.0 mmol/L).