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| Ladwig,R.; Vigo,A.; Fedeli,L.M.G.; Chambless,L.E.; Bensenor,I.; Schmidt,M.I.; Vidigal,P.G.; Castilhos,C.D.; Duncan,B.B.. |
| Multi-center epidemiological studies must ascertain that their measurements are accurate and reliable. For laboratory measurements, reliability can be assessed through investigation of reproducibility of measurements in the same individual. In this paper, we present results from the quality control analysis of the baseline laboratory measurements from the ELSA-Brasil study. The study enrolled 15,105 civil servants at 6 research centers in 3 regions of Brazil between 2008–2010, with multiple biochemical analytes being measured at a central laboratory. Quality control was ascertained through standard laboratory evaluation of intra- and inter-assay variability and test-retest analysis in a subset of randomly chosen participants. An additional sample of urine... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Multi-center studies; Laboratory measurements; Quality control. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2016000900701 |
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| Vigo,A.; Duncan,B.B.; Schmidt,M.I.; Couper,D.; Heiss,G.; Pankow,J.S.; Ballantyne,C.M.. |
| To efficiently examine the association of glutamic acid decarboxylase antibody (GADA) positivity with the onset and progression of diabetes in middle-aged adults, we performed a case-cohort study representing the ~9-year experience of 10,275 Atherosclerosis Risk in Communities Study participants, initially aged 45-64 years. Antibodies to glutamic acid decarboxylase (GAD65) were measured by radioimmunoassay in 580 incident diabetes cases and 544 non-cases. The overall weighted prevalence of GADA positivity (³1 U/mL) was 7.3%. Baseline risk factors, with the exception of smoking and interleukin-6 (P £ 0.02), were generally similar between GADA-positive and -negative individuals. GADA positivity did not predict incident diabetes in multiply adjusted (HR =... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diabetes mellitus; Glutamic acid decarboxylase; Auto-immune diseases; Inflammation; Risk factors. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2007000700007 |
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