Objective: To compare the proportion of patients with uncontrolled hypertension when using 24 hours ambulatory blood pressure monitoring (ABPM) or office blood pressure.
Methodology: This is a cross sectional study conducted among 105 hypertensive patients attending Primary Care Clinic, HUSM. Schiller BR-102 plus was used to get 24 hours blood pressure (BP) reading. Mean of two office BP were taken. McNemar’s test was applied to compare between the proportion of uncontrolled hypertension measured by an ABPM and office blood pressure.
Results: The mean (SD) age was 51.8 (9.34) years. The mean (SD) 24 hours systolic and diastolic BP were 128.4 (12.7) mmHg and 79.7 (8.74) mmHg respectively. Mean (SD) systolic and diastolic office BP was 144.2(15.16) mmHg and 90.2(9.71) mmHg. The proportion of uncontrolled systolic and diastolic based on 24 hours ABPM were 26.7% and 23.8%, respectively. The proportion of uncontrolled office blood pressure (57.1% systolic and 61.0% diastolic) was significantly higher.
Conclusion: The office blood pressure measurement overestimated uncontrolled hypertension compared to 24 hours ABPM. Therefore using ambulatory blood pressure was clinically important to get a better understanding of blood pressure control.