Medication adherence and factors associated with poor adherence among type 2 diabetes mellitus patients on follow-up at Kenyatta National Hospital, Kenya.

INTRODUCTION

Medication non-adherence is a common problem facing health care providers treating adult type 2 diabetes mellitus patients. Poor glycaemic control associated with increased morbidity and mortality are resulting consequences. The objective of this study was to assess medication adherence among Type 2 diabetes mellitus patients.

METHODS

This is a cross-sectional study conducted at Kenyatta National Hospital from November 2015 to January 2016. 290 Type 2 diabetic patients were enrolled. A questionnaire was used for data collection. Adherence levels were determined by patient scores on Morisky Medication Adherence Scale-8 and glycaemic control by blood assay for glycosylated haemoglobin. Ordinal logistic regression modelling was done using STATA software to determine factors associated with poor medication adherence.

RESULTS

The prevalence of medication adherence low for 28.3 % [95% CI: 23.1, 33.5], medium for 26.2% (95% CI: 21.1, 31.3) and high for 45.5% (95% CI: 39.6, 51.3) of study participants. Glycaemic control was good (HbA1c < 7%) for 107 (36.9 %) of study participants. Dissatisfaction with family members support (OR = 2.99, CI = 1.12-7.98), patients with 2-10 years duration of disease (OR = 2.07, CI = 1.01-4.22), ever being admitted for diabetes mellitus (OR = 2.94, CI = 1.60-5.41), challenge in drug access (OR = 1.76, CI = 1.01-3.05) and dissatisfaction with attending clinicians (OR = 3.58, CI= 1.36 - 9.43) were factors found associated with poor medication adherence.

CONCLUSION

A majority of type 2 diabetes mellitus patients have suboptimal medication adherence. Family support, affordability of medications and good healthcare provider-patient communication are important in ensuring medication adherence.