Objective: To determine the prevalence of MUCH and to identify the relation between uncontrolled hypertension and factors such as anthropometry (age, gender), cardiovascular risk hypertension (smoking, history of cardiovascular disease, family history of hypertension type 2 diabetes mellitus, body mass index), current hypertension treatment (number of daily doses, number daily dose, combination of drugs, antihypertensive drugs, number of daily oral dosage, type of tablet used, duration of hypertension, systolic and diastolic blood pressure measurements, multi-diseases, multi-drug) in elderly patients treated hypertension is controlled at Gia Dinh Hospital.