Descriptive cross-sectional study on knowledge, awareness and adherence to medication among hypertensive patients in a tertiary care center, Eastern Sri Lanka

Abstract

Introduction: Hypertension is one of the common non-communicable diseases and public health problem among developed and developing countries. The lack of knowledge and awareness on hypertension and poor adherence of medication are a major challenge to control hypertension and prevent its complications. Our study aimed to assess the knowledge, awareness of hypertension and adherence to medication among hypertensive patients attending the medical clinics of a tertiary care center, Eastern Province of Sri Lanka. Methods: A descriptive cross-sectional study was conducted among hypertensive patients to assess knowledge, awareness of hypertension and adherence to medication in medical clinics in a tertiary care for 6 months duration. Data were collected by using pretested and validated Hypertension Facts Questionnaire. Their medication adherence and the reasons for nonadherence were studied using Medication Adherence Scale. Data were analyzed using SPSS (version 18) analytical package and the chi-square test was performed. The scoring system was used to categorize the level of knowledge and awareness of hypertension among patients. Results: The majority of patients had moderate-to-high knowledge (101, 65.8%) about hypertension and had moderate-to-high awareness (111, 73.2%) on hypertension. Even though, 134 (87.6%) patients knew that they have hypertension, and 108 (70.6%) patients did not know their blood pressure value at the time of diagnosis. Most of the patients (90, 58.8%) had good drug adherence, and most of them (141, 92.1%) thought that taking medicine plays a key role to control their blood pressure. The main reasons for nonadherence of medication were forgetfulness (39, 32%) and expenses (46, 35.4%). The knowledge and awareness about hypertension among respondents were significantly associated with educational level (p < 0.05) Conclusion: Most of the patients had adequate knowledge on the risk factors and complications of hypertension. But they were unaware about their disease status, and their diagnosis, target organ damage and recent blood pressure values. The drug adherence was reasonably adequate. The main reasons for nonadherence of medication were forgetfulness and expenses.