[Comparative study on electronic sphygmomanometer and mercury sphygmomanometer among adults in the field study]

Abstract

Objective: To compare the electronic sphygmomanometer with mercury sphygmomanometer on measuring the average blood pressure, prevalence of hypertension in a same population. To set up a numerical relationship between two blood pressure value of the two devices.

Methods: 544 adults of ≥ 18 years old were from 6 neighborhood of Hunan Province. OMRON HEM-907 and mercury sphygmomanometer were used to test the difference. The blood pressure value of mercury sphygmomanometer was gold standard. The difference of systolic pressure and diastolic pressure of two devices was tested using paired t test and Bland-Altman analysis. Chi-square test was used to analyze the two prevalence of hypertension among the same population. The equation of linear regression was established using the value of blood pressure of two devices.

Results: Paired t test showed the statistical difference on the systolic pressure and diastolic pressure of two devices (P < 0.0001). Chi-square test presented a higher prevalence of hypertension by using the electronic sphygmomanometer (P < 0.0001). Bland-Altman analysis showed mercury sphygmomanometer couldn't be simply replaced by electronic sphygmomanometer. The two independent equation of linear regression was calculated on systolic pressure and diastolic pressure.

Conclusion: The difference still existed when using the electronic sphygmomanometer and mercury sphygmomanometer at a large scale population. It's important to conduct the comparative study on electronic sphygmomanometer and mercury sphygmomanometer.