卫生研究

目的研究在现场调查中,电子血压计与汞柱式血压计得到的人群平均血压水平、高血压患病率之间的差异,并得到两种血压计结果的数值转换关系。方法样本来自湖南省攸县6个居委会的18岁及以上成年人共544名,使用欧姆龙HEM-907电子血压计和汞柱式血压计进行比对,汞柱式血压计测量值为金标准。两种血压计同时各测量3次取平均值。利用配对t检验、Bland-Altman图示分析法来验证两种血压计测量结果的差异或一致性;卡方检验验证两种设备判断高血压患病率是否存在差异;用一般线性回归得到不同设备血压值之间的换算方程。结果配对t检验显示两种血压计所得收缩压、舒张压值有统计学差异(P<0.0001);χ2检验显示,两种血压计在判定成人高血压患病率上具有统计学差异,电子血压计高于汞柱式血压计(χ2=422.6,P<0.0001)。Bland-Altman图示表明两种血压计不能替换;得到两种设备血压值之间的回归方程:电子血压计收缩压=11.65+0.96×汞柱式血压计收缩压(R2=0.9391,P<0.0001),电子血压计舒张压=2.27+0.95×汞柱式血压计舒张压(R2=0.8133,P<0.0001)。结论在大规模营养与健康的现场调查中,电子血压计和汞柱式血压计存在一定差异,在使用电子血压计前建议进行应用上的比较研究。

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 pressureof 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.