Citation: Abdul Aziz AM, et al. Drug Utilization in the Treatment of Diabetes Mellitus in the Ministry of Health Facilities. Petaling Jaya: Pharmaceutical Services Division, Ministry of Health, Malaysia; 2013
Diabetes Mellitus (DM) is a costly disease to manage because of its chronic nature and severity of complications. Treatment of DM incurred high healthcare cost in both developed and developing countries. In Malaysia, treatment of DM is provided by all Ministry of Health (MOH) healthcare facilities and treatment may vary according to types of facilities. These differences may be associated with the utilization pattern and patient’s adherence to therapy and it is important to link actual medication therapy and the direct medical cost in the management of Malaysian DM patients. Thus, this study is to describe the utilization of medications in the treatment of DM in the MOH healthcare facilities and DM patient’s adherence towards their medication. This is a cross-sectional study in 94 MOH health facilities from November 2010 to December 2011. The healthcare facilities were categorized as National Referral Hospital, State Hospitals, Hospitals with Specialist, Hospitals without Specialist and Health Clinics. Patients were selected by the method of systematic random sampling and screened based on the inclusion and exclusion criteria. Face-to-face interview and retrospective data retrieval of patients’ medical record were conducted. The questionnaire and Morisky’s four questions adherence scale were utilized during the interview. A total of 2,509 (88.2%) patients were included in the study. The findings showed that variables for age, gender, race, marital status, household income, and occupation were essential components in examining its impact towards DM care. Most of the patients were between 45 to 55 years old and were burdened with co-morbidities. The observed trend in disease status showed that DM is closely related to co-morbidities such as hypertension, cardiovascular diseases, and hyperlipidaemia; more commonly in patients with more than 5 disease years. A total of 14.6% of DM patients have yet to be initiated with insulin while 84% and 78.9% of patients had poor control of HbA1c and fasting blood glucose. In terms of drug utilization and medication cost, there was no significant difference in the pattern of medication used for the first-line treatment of DM among type of facilities. Biguanides, sulphonamides, urea derivatives, and insulin are the top three DM medications. Insulin usage ranges from 25.6% at Hospitals without Specialist to 57.8% at State Hospitals and this corresponds to 2.5 to 7.0 times increment from National Health and Morbidity Survey (NHMS) III. Use of non-antidiabetic agents (ADA) corresponds with the top 10 co-morbidities. These include platelet aggregating inhibitors, ACE-inhibitors and statins. The pattern of treatment for co-morbidities showed significant differences among facilities and may be due to the degree of severity of DM patients. Also, the policies of categorizing A*/A/KK has led to these medications being less commonly prescribed in Hospitals without Specialist and Health Clinics. Adherence is an issue that DM patients need to improve. This study found that race, household income, and age were significant indicators for poor adherence. The odds ratio (OR) for age showed it contributed to almost one time lower in adherence. The OR for inter-racial differences found that both Chinese and Indian patients were about 0.7 times more likely to be non-adherence than Malays. Household income of less than RM1,000 per month similarly showed a 0.8 times less adherence compared to households earning between RM1,000 to RM3,000 per month. Pharmacists had been giving counselling to patients and the personalized approach by pharmacist had shown positive impact on Diabetic Medication Therapy Adherence Clinic (DMTAC) patients. The study findings, however, showed no improvement in adherence between those who attended DMTAC and those who have not. These findings might not be generalizable since most facilities had a very small percentage of DM patients and they are usually the problematic or difficult patients; this could have led to the rather uneventful findings. Finally, this study showed that there is no significant difference in the utilization of medication among health facilities in the treatment of DM. Adherence is still an area of concern and collaboration between healthcare professionals is vital for better treatment outcome.