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Korean Journal of Epidemiology 2005;27(2): 51-60.
Reproducibility of information on cardiovascular risk factors and self-rated health status collected in the National Health Insurance Corporation health examination among 94,183 Korean military personnel.
Ki Ho Park
Division of Infectious Disease Surveillance, Korea Centerfor Disease Control and Prevention, Korea.
Abstract
While health examination data from the National Health Insurance Corporation (NHIC) have been used by many researchers for investigating the risk factors of cardiovascular disease or cancer, most studies have used measurements made on a single occasion at the start of the study (baseline measurements only) or 2 initial measurements in the beginning of the study period for their analyses. This study was conducted to investigate the reproducibility of information on cardiovascular risk factors and self-rated health status collected in the NHIC health examinations by performing measurement and re-measurement data analysis techniques. A total of 94,183 military personnel, including commissioned and noncommissioned officers and public service workers, who had participated in both the 1998 and 2001 NHIC health examinations were included in this study. Reproducibility was excellent regarding height, weight, and body mass index. However, reproducibility was unsatisfactory for cardiovascular risk factors and self-rated health status. In particular, low reproducibility was exhibited for blood pressure and physical exercise in both men and women. This study emphasizes the importance of considering regression dilution biases when conducting studies for disease risk factors using large population cohort data.
Keywords: reproducibility; risk factor; measurement; bias


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