期刊
JOURNAL OF CLINICAL EPIDEMIOLOGY
卷 56, 期 8, 页码 768-774出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/S0895-4356(03)00085-4
关键词
BP measurements; quality assurance; NHANES
Objective: We describe the National Health and Nutrition Examination Survey (NHANES) blood pressure (BP) observer training and protocol standardization and evaluate the quality of BP measurement. Methods: The participants were persons aged 8 years and older who had their BP measured (n = 7467) during NHANES 1999-2000. Cuff width/arm circumference ratio (CW/AC), end digit preference, and observer agreement were examined. Results: In stepwise principal components multiple regression analysis, CW/AC accounted for less than 2% of variability R-2 in all readings. The frequencies for all end digits were close to 20% (0 end digit = 21% systolic and 23% diastolic). No overall observer effect was present for mean systolic BP readings. A significant observer effect (P <.0001) was detected for mean diastolic BP readings of <90 mm Hg. For readings of greater than or equal to90 mm Hg, there was no significant observer effect (P =.157). Conclusion: We conclude-that NHANES,BP measurements do not demonstrate the variability that is commonly caused by observer and technical error. (C) 2003 Elsevier Inc. All rights reserved.
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