Koenig, W.* ; Sund, M. ; Fröhlich, M.* ; Löwel, H. ; Hutchinson, W.L.* ; Pepys, M.B.*
     
    
        
Refinement of the Association of Serum C-reactive Protein Concentration and Coronary Heart Disease Risk by Correction for Within-Subject Variation over Time : The MONICA Augsburg Studies,1984-1987.
    
    
        
    
    
        
        Am. J. Epidemiol. 158, 357-364 (2003)
    
    
    
      
      
	
	    The authors sought to assess the repeatability of
	measurements of C-reactive protein, an independent
	predictor of coronary heart disease, in a large cohort of apparently healthy men and to correct earlier estimates
	of the association of C-reactive protein and coronary heart disease for the measurement error in this protein. They
	measured C-reactive protein by a high-sensitivity assay in 936 men aged 45–64 years in the MONICA (Monitoring
	of Trends and Determinants in Cardiovascular Disease) Augsburg cohort in 1984–1985 and remeasured it 3
	years later. All men were subjected to an 8-year follow-up of their cardiovascular status. The analytical variation
	of the assay was small, with the analytical variance component at 1 percent of the within-subject variance
	component, a repeatability coefficient of 25 percent, and a reliability coefficient of 1.00. In contrast, the within-
	subject variation of C-reactive protein corresponded to a repeatability coefficient of 740 percent and a reliability
	coefficient of 0.54, indicating considerable within-subject variation. Based on the authors’ estimates, three serial
	determinations of C-reactive protein should be done to achieve a reliability of 0.75, the value they found for total
	cholesterol. Correcting the hazard ratios in their original analysis of the association of coronary heart disease and
	high-sensitivity-assay C-reactive protein for the measurement error in C-reactive protein and covariables leads
	to a considerably larger estimate. The results suggest that the true association between C-reactive protein and
	cardiovascular risk is underestimated by a single C-reactive protein determination, and that several serial C-
	reactive protein measurements should be taken.
	
	
	    
	
       
      
	
	    
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        Publication type
        Article: Journal article
    
 
    
        Document type
        Scientific Article
    
 
    
        Thesis type
        
    
 
    
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        Keywords
        coronay disease; inflammation; predictive value tests; proteins
    
 
    
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        Language
        english
    
 
    
        Publication Year
        2003
    
 
    
        Prepublished in Year
        
    
 
    
        HGF-reported in Year
        0
    
 
    
    
        ISSN (print) / ISBN
        0002-9262
    
 
    
        e-ISSN
        1476-6256
    
 
    
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        Quellenangaben
        
	    Volume: 158,  
	    Issue: 4,  
	    Pages: 357-364 
	    Article Number: ,  
	    Supplement: ,  
	
    
 
    
        
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            Oxford University Press
        
 
        
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        Reviewing status
        Peer reviewed
    
 
     
    
        POF-Topic(s)
        30202 - Environmental Health
    
 
    
        Research field(s)
        Genetics and Epidemiology
    
 
    
        PSP Element(s)
        G-505300-002
FE 75372
G-503900-004
    
 
    
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        Erfassungsdatum
        2003-12-31