Category Archives: Indroduction

Multiple Imputations of missing values — ein Erfahrungsbericht

Intro In der Forschungspraxis werden Datenpunkte mit fehlenden Werten oft von der Analyse ausgeschlossen oder durch einen zentralen Lageparameter (Mittelwert, Median) ersetzt. Als Alternative dazu hat sich das Verfahren der Multiplen Imputation etabliert, welches in diesem Beitrag erklärt wird. Die … Continue reading

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How to calculate Odds Ratios in Case-Control Studies using R

Intro In June 2017 I've started working at the Clinical Trial Centre Leipzig at Leipzig University. Since my knowledge in statistics is rather poor, my employer offered me to attend some seminars in Medical Biometry at the University of Heidelberg. … Continue reading

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How to use R for matching samples (propensity score)

According to Wikipedia, propensity score matching (PSM) is a “statistical matching technique that attempts to estimate the effect of a treatment, policy, or other intervention by accounting for the covariates that predict receiving the treatment”. In a broader sense, propensity … Continue reading

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