ASSA13-14-10 The Heterogeneity of the Two Orthostatic Hypertension Populations Defined by Amplitude and Absolute Methods

Background Two methods have been used for diagnosing orthostatic hypertension (OHT), but it is unclear whether the populations with OHT defined by these 2 methods have similar demographic characteristics. Methods Supine and upright BPs were measured (Omron HEM-7101) in 916 adults with normal supine blood pressure (BP). The difference between upright and supine BP was recorded as ΔBP. The criteria for OHT on SBP (s-OHT) in amplitude method was ΔSBP ≥ 10mmHg and than in absolute value method was upright SBP≥140mmHg. The demographic characteristics and BP of 2 s-OHT groups were compared. Results In this population, the detection rate of s-OHT on amplitude method was significantly higher, than that on absolute method (21.8% vs 14.7%, P < 0.05). Only 91 the 135 s-OHT cases on absolute method were included into the 200 cases on amplitude method and the overlapping rate was 37.3%. The s-OHT group on absolute method shows higher male percentage, age, BMI, supine and upright SBP compared with amplitude method. Conclusions The detection rates of s-OHT vary with the defining methods in a community population. The two s-OHT groups defined by amplitude method and absolute method have obvious heterogeneity in demographic characteristics, supine and upright SBP, especially in young population.