Prevalence of Undiagnosed Hypertension and Its Predictors in Jordan: A Cross-Sectional Study

Hypertension is an important cause of morbidity and mortality worldwide. Undiagnosed hypertension is a serious issue that leads to increased morbidity and mortality. In this study, we aim to identify the prevalence of undiagnosed hypertension in the healthy Jordanian population, as well as identify predictors of high blood pressure readings in presumably healthy Jordanians.

We recruited healthy visitors accompanying patients at our Jordan University Hospital Clinics ranging from 18 to 80 years of age. We measured each participant's systolic and diastolic blood pressure at our outpatient clinics on two different days, one week apart. We also obtained demographic data, weight, height, smoking status, and family history of hypertension and cardiovascular diseases.

A total of 896 participants were included in this study with a mean age of 48 years. The median of systolic blood pressure readings was 125 mmHg, and the median of diastolic blood pressure readings was 83 mmHg. 38.5% had undiagnosed stage 1 hypertension and 30.5% had undiagnosed stage 2 hypertension according to the American College of Cardiology/American Heart Association guidelines. On the other hand, 25.4% had undiagnosed grade 1 hypertension and 5.1% had undiagnosed grade 2 hypertension according to the European Society of Hypertension guidelines.

According to the ACC/AHA guidelines, 68.5% of previously healthy Jordanians met the criteria to be diagnosed with hypertension. Predictors of high systolic blood pressure were age, BMI and family history of CAD, while female gender is associated with a lower systolic blood pressure. For diastolic blood pressure, only BMI and family history of CAD were associated with significantly higher diastolic blood pressure, while female gender and exercise were significantly associated with lower diastolic blood pressure.