The Management of Diabetes Mellitus in Patients with Chronic Kidney Disease: A Population-Based Study in Southern Italy.

BACKGROUND AND OBJECTIVES: Diabetes mellitus in patients with chronic kidney disease (CKD) is known as diabetic kidney disease (DKD). Pharmacological management of DKD is challenging due to reduced renal excretion of some antidiabetic drugs. The aim of this population-based study was to explore antidiabetic drug use in DKD patients from Southern Italy. METHODS: The Arianna database from Caserta Local Health Unit was used. Diabetic patients with incident CKD [first diagnosis date: index date (ID)] were identified by searching for specific ICD9-CM codes among hospital discharge diagnoses/procedures and/or indication of use associated with drug prescriptions. To evaluate any change in the use of antidiabetic drugs after the CKD diagnosis, the prevalence of antidiabetic drug use among DKD patients was calculated within 1 year prior to/after ID and after dialysis entry. A Kaplan-Meier analysis was used to assess the time to discontinuation of antidiabetic drugs after CKD diagnosis. The frequency of antidiabetic drugs contraindicated in renal disease in DKD patients was measured. RESULTS: Overall, 725 diabetic patients (mean age 72.8 ± 11.4 years) had incident CKD from 2006 to 2011. The use of combination antidiabetic drugs, biguanides and sulphonamides decreased by approximately 10, 7 and 5%, respectively, after the ID. The use of insulins increased by 10% after the ID and by 20% after entry into dialysis. The use of antidiabetic drugs not contraindicated in CKD decreased marginally after the diagnosis of CKD. CONCLUSION: In a general practice of Southern Italy the management of diabetes mellitus changed only marginally in newly diagnosed CKD patients, suggesting a therapeutic inertia on the part of prescribers.

Prescription Patterns of Antidiabetic Treatment in the Elderly. Results from Southern Italy.

The treatment of diabetes in the elderly is a major challenge both in terms of clinical management and of public health. Evidence about prescribing patterns in the elderly diabetic population is limited. The aim was to describe trends in antidiabetic drug (AD) utilization patterns in the elderly in Southern Italy with a focus on drugs for cardiovascular prevention and pharmaceutical costs. The data used for this study were obtained from pharmacy records of Caserta Local Health Authority, a province in Southern Italy with 1 million of inhabitants, comprising urban and rural areas. Subjects above 65 years who received at least one dispensing of antidiabetic between January 2010 and December 2014 were selected. Prevalence and incidence rates (%) of AD use were calculated for each calendar year and stratified by class therapy and age group. Sub-analyses by cardiovascular co-medication therapy and pharmaceutical cost analysis were performed. The prevalence rate decreases from 22.0% in 2010 to 17.5% in 2014 (p<0.001). Proportion of subjects treated with monotherapy increases over the study period (33.9% in 2010; 38.6% in 2014; p<0.001). In particular, increases the proportion of users of metformin (18.2% in 2010; 23.7% in 2014; p<0.001), while the proportion of users of sulfonylureas dropped (11.0% in 2010; 7.2% in 2014; p< 0.001). About 90% of elderly diabetic patients are treated with drugs for cardiovascular prevention. The per/patient/yearly drug costs were 2,349 ∈: 28.5% for AD therapy and 71.5% for other treatments. Trend in drug utilization patterns showed a tendency towards treatment recommendations in older adults.