Conducting a clinical trial is a te...

Conducting a clinical trial is a team effort. The collaboration of data managers and statisticians is important to assure the quality of the data, which is usually controll for at the consideration design, data collection, data entrance and data management stages. The data periodically frozen for analyses and the generation of reports, however, are frequently not ready to use in an ongoing trial. It is always a pious practice for a statistician who handles the first-hand data to check and clean them first. Since a statistician manipulates the data in a fashion that is different from the data

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