Differences of age and gender in orthostatic hypertension-a single-center study / 中南大学学报(医学版)

ABSTRACT

OBJECTIVE@#To explore the differences of Chinese people's age and gender in orthostatic hypertension (OHT) by a single-center experience study.
@*METHODS@#A total of 2 994 patients with unexplained syncope and dizziness, who were outpatients or had been hospitalized in Second Xiangya Hospital, Central South University from January 2000 to August 2012, were chosen and subjected to the head-up tilt table test (HUTT). Their ages ranged from 2.00 to 78.00 years old, with an average at 19.07±14.78 years old. There were 1 406 and 1 588 cases for male and female, respectively. A total of 745 patients were OHT, who were divided into a adult group (≥18 years old, 247/904 cases) and a children group (0.05), but it was higher in the adult group compared with that in the children group (27.05% vs 23.83%, χ2=4.125, P=0.042). There were 52 cases (6.98%) of high systolic and high diastolic blood pressure (sOHT merge dOHT), 16 cases (2.15%) of simple high systolic blood pressure OHT (sOHT), and 677 cases (90.87%) of simple high diastolic blood pressure OHT (dOHT) in the 745 patients with OHT. The incidence of dOHT and sOHT merge sOHT in the adults group were significantly higher than those in the children group (1.11% vs 0.29%, χ2=7.965, P0.05); there was also no statistical difference in sOHT plus dOHT and dOHT between males and females (sOHT merge dOHT 1.71% vs 1.76%, χ2=0.014, P>0.05; dOHT 23.68% vs 21.66%, χ2=1.742, P>0.05; 1.71% vs 1.76%, χ2=0.014, P>0.05, respectively); but the dOHT was significantly higher in the males than that in the females in the children group (24.53% vs 19.74%, χ2=6.933, P>0.05). 2) There was no difference in the increment of systolic blood pressure in sOHT plus dOHT [(25.62±4.96) mmHg vs (23.54±5.83) mmHg, t=1.385, P>0.05] and the increment of diastolic blood pressure in dOHT [(13.46±3.49) mmHg vs (13.23±3.22) mmHg, t=0.840, P>0.05] between the adults group and the children group. There was no difference in the increment of systolic blood pressure in sOHT [(25.44±4.96) mmHg vs (23.68±5.35) mmHg, t=1.411, P>0.05] and the increment of diastolic blood pressure in dOHT [(14.09±4.28) mmHg vs (13.05±3.82) mmHg, t=1.887, P>0.05] between the adults group and the children group.
@*CONCLUSION@#The incidence of OHT is higher in the adults group than that in the children group. There is no difference in systolic and diastolic blood pressure increment within 3 minutes during HUTT between the adults and children.