On Biostatistics and Clinical Trials
CQ's web blog on the issues in biostatistics and clinical trials.
Sunday, March 08, 2015
Graphic Presentation: Kaplan-Meier Plot, Q-Q plot, Box Plot, Funnel Plot, Swimmer Plot, Forest Plot, Spaghetti Plot, Bubble Plot
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Data visualization is one critical part in statistical analysis. Data visualization is through various plots. Here are some of the plots co...
Sunday, March 01, 2015
Handling the Dates and Times in Clinical Trial Data Collection Using SAS
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In clinical trials, we always need to deal with the dates and times in data collection. For example, we will need to record the date of sign...
Saturday, February 14, 2015
Data Transport Across Different Platforms: Creating and Reading the SAS transport files (.xpt, .cpt, .dat)
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Since there are different computer platforms (Windows - PC, Unix, Linux , OpenVMS ), it is often necessary to create the transport file so ...
Sunday, February 01, 2015
Adverse Event of Special Interest (AESI), Standardized MedDRA Query (SMQs), Customer Queries (CQs) or Customer MedDRA Queries (CMQs), and SAS Programming
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When we perform the safety analyses for clinical trial data or post-marketing pharmacovigilence data, one of the common approach is to ident...
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