Comments on: blood product transfusion in emergency department patients: a case control study of practice patterns and impact on outcome |
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Authors: | Manoochehr Karami Salman Khazaei |
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Affiliation: | 1.Research Center for Health Sciences,Hamadan University of Medical Sciences,Hamadan,Iran;2.Department of Epidemiology, School of Public Health,Hamadan University of Medical Sciences,Hamadan,Iran;3.Department of Epidemiology and Biostatistics, School of Public Health,Tehran University of Medical Sciences,Tehran,Iran |
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Abstract: | Clinical decision makings according studies result require the valid and correct data collection, andanalysis. However, there are some common methodological and statistical issues which may ignore by authors. In individual matched case- control design bias arising from the unconditional analysis instead of conditional analysis. Using an unconditional logistic for matched data causes the imposition of a large number of nuisance parameters which may result in seriously biased estimates. |
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