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HOME > Epidemiol Health > Volume 21(1); 1999 > Article
Original Article Measurement Errors on Normotensive Subjects in Screening Test.
Jong Myon Bae, Dae Sung Kim, Jaiyong Kim, Yoon Ok Ahn
Epidemiol Health 1999;21(1):1-7
DOI: https://doi.org/
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1Department of Preventive Medicine, College of Medicine,Cheju National University.
2Department of Preventive Medicine, Gachon Medical School.
3Department of Preventive Medicine, College of Medicine,Seoul National University.

BACKGROUND
Blood pressure measurements with a mercury sphygmomanometer serve as the screening test to establish the clinical diagnosis of primary hypertension. But one of the problems of hypertension screening is the variability of blood pressure measurements.
METHODS
In order to identify the measurement error of blood pressure through the biennial health screening program of Korea Insurance Medical Corporation, we compared the blood pressure of screening test with true value which defined as the mean of blood pressures taken from the direct contact and twice check-up among normotensive Seoul Cohort participants.
RESULTS
Three hundred forty-nine participants had both data of screening measurement and survey of direct contact. The means of difference in systolic and diastolic blood pressure between both data were 8.47 mmHg and 6.54 mmHg, respectively. These results showed statistical significance with paired t-test (p=0.001).
CONCLUSION
Our findings indicated that screening measurement of blood pressure had false negative. And if a epidemiologic study about blood pressure used the data of screening test, it should adjust value of systolic and diastolic blood pressure with adding 8 and 7 mmHg, respectively.


Epidemiol Health : Epidemiology and Health