Despite the fact that the goals for the management of hypertension are well-defined and effective therapies are available, control of hypertension remains poor in countries with low resources including Ethiopia. This study aimed to determine blood pressure control rate and its determinants among ambulatory adult hypertensive patients at Jimma University Medical Center.

A general prospective cohort study was conducted among adult hypertensive patients who had regular follow-up at Jimma University Cardiac Clinic from 20 March to 20 June 2018. Hypertensive patients who fulfilled the inclusion criteria were selected in the first month of the data collection period. Then, only those patients who visited the clinic at the first month were consequently followed-up for the next 3 months. The Eighth Joint National Committee guideline was used to categorize controlled and uncontrolled blood pressures. Patients’ specific data were collected using a structured data collection tool. Data were analyzed using the statistical software package SPSS version 21.0. Bivariate and multivariable logistic regression analysis was used to identify independent variables influencing blood pressure control. p-values of less than 0.05 were considered statistically significant.

From a total of 416 patients, 237 (57.0%) were male with a mean age of 56.50 ± 11.96 years. Two hundred and fifty eight (62.0%) participants had comorbid conditions and 275 (66.1%) were on combination therapy. The rate of blood pressure control was 42.8%. Age ⩾60 years was negatively associated with uncontrolled blood pressure (adjusted odd ratio = 0.52, confidence interval = 0.31–0.88, p = 0.015). Medication non-adherence (adjusted odd ratio = 1.64, confidence interval = 1.04–2.58, p = 0.034) and non-adherence to international guidelines (adjusted odd ratio = 2.33, confidence interval = 1.49–3.64, p < 0001) were positively associated with uncontrolled blood pressure.

The rate of blood pressure control among hypertensive patients was suboptimal. Age, clinicians’ non-adherence to international guidelines, and patients’ non-adherence to medications were independent predictors of blood pressure control. Physicians and clinical pharmacists should adhere to guidelines for better treatment and care of hypertensive patients.