Primary Objective:
Prevalence in patients with resistant hypertension among hypertensive patients who have been treated in Korean general hospitals
Secondary Objectives:
Analysis of correlation in patients with resistant hypertension and patients with controlled hypertension who received triple antihypertensive therapy in terms of demography, clinical characteristics and other factors
1. Demographic data (age, sex, and body mass index)
2. Clinical characteristics
* Vital signs
* Lifestyles (history of drinking, smoking, and exercise)
* Family history (hypertension, diabetes mellitus, dyslipidemia, cardiovascular disease, renal/adrenal disease, cerebrovascular disease, and respiratory disease)
* Concurrent diseases (diabetes mellitus, dyslipidemia, cardiovascular disease, renal/adrenal disease, cerebrovascular disease, respiratory disease, and others)
* History of antihypertensive therapy (past and present)
* Medication compliance of antihypertensives
* Concomitant medications
