The care of patients with diabetic nephropathy: audit, feedback, and improvement

Diabetic nephropathy is the commonest cause of end-stage renal failure in the developed world. The quality of care of 152 patients with diabetic nephropathy was assessed at the time of referral to a single nephrologist. The type II diabetics (62%) were older than the type I diabetics (38%) (mean 65 years vs. 48 years). The mean duration of diabetes was 17 years. Significant cardiovascular disease was present in 52%. There was diabetic retinopathy in 84% of the type I diabetics and 53% of the type II diabetics. Overall, 63% had hypertension at referral (St Vincent Declaration criteria), untreated in 25%. ACE inhibitors were not prescribed in 48% when no contraindications to their use were present. Glycosylated haemoglobin was > 9.1% in 29%. Twenty were prescribed medications inappropriate to their renal function. Of patients with ischaemic heart disease and serum cholesterol > 5.5 mmol/l, 82% were untreated; 82% of patients with secondary hyperparathyroidism were also untreated. At initial referral, many patients' care was sub-optimal. Referral was too late for adequate preparation for renal replacement therapy in 33%. Following a process of education and feedback of the results to referring practitioners, the timing of referral improved. We emphasize the need for closer co-operation between those managing diabetic patients with nephropathy to optimize their care.