PS-BPC04-4: PREVALENCE AND CLINICAL CHARACTERISTICS OF HYPERTENSION SUBTYPES ACCORDING TO HOME BLOOD PRESSURE CONTROL IN TREATED HYPERTENSIVE PATIENTS: A CROSS-SECTIONAL STUDY

Abstract

Objective: To identify the prevalence and clinical characteristics of the different hypertension subtypes according to home blood pressure (BP) control in treated hypertensive patients. Design and method: This study was conducted in Siriraj hospital, Mahidol University, Thailand during 2019 to 2020. We included treated hypertensive patients with at least 1 antihypertensive medications and had self-home BP measurement. Hypertension subtypes were normotension (NT) (all home BPs were less than 135/85 mmHg), isolated morning hypertension (MHT)(morning BPs were only at least 135/85 mmHg), isolated evening hypertension (EHT)(evening BPs were only at least 135/85 mmHg) and sustained uncontrolled hypertension (SHT)(all home BPs were at least 135/85 mmHg). We analyzed the clinical data to evaluate blood pressure control rate and identify the associated clinical factors in the other groups. Results: Our study included 1,435 participants. The prevalence of home BP control was 55.82%, 12.61%, 7.32%, and 24.25% in NT, MHT, EHT, and SHT, respectively. Overall mean age was 63 years. There were 39.58% men. SHT group had significantly the highest body mass index, proportions of alcohol drinking and evening administration of antihypertensive medications. The participants in EHT group used the highest number of antihypertensive medication classes and chronic kidney disease was most found in this group. The multivariable analysis showed the significant association of history of CVD with MHT (OR 2.93, 95%CI (1.46 to 5.85)). The albuminuria of at least 300 mg/g was the significant associated factor of EHT (OR 3.05, 95%CI (1.23 to 7.57)) and SHT (OR 2.20, 95%CI (1.14 to 4.27)). Aging (OR 0.98, 95%CI (0.96 to 0.99)), use of thiazide diuretics (OR 3.38, 95%CI (1.03 to 11.11)), sprironolactone (OR 5.68, 95%CI (1.38 to 23.33)) and peripheral alpha1 blockers (OR 3.90, 95%CI (1.16 to 13.11)) were also strongly associated with SHT. Conclusions: BP control rate was fair. There were different clinical characteristics and independent associated factors in each subtypes.