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On Biostatistics and Clinical Trials: August 2014
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On Biostatistics and Clinical Trials. CQ's web blog on the issues in biostatistics and clinical trials. Friday, August 29, 2014. Subgroup Analysis in Clinical Trials - Revisited. I had previously written an article about the sub-group analysis. EMA is again ahead of FDA in issuing its regulatory guidelines on this topic. Following an expert workshop on subgroup analysis. EMA issued its draft guideline titled “ Guideline on the investigation of subgroups in confirmatory clinical trials. Sometimes it is no...
onbiostatistics.blogspot.com
On Biostatistics and Clinical Trials: September 2014
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On Biostatistics and Clinical Trials. CQ's web blog on the issues in biostatistics and clinical trials. Saturday, September 13, 2014. N of 1 Clinical Trial Design and its Use in Rare Disease Studies. In the beginning (February) of this year, I attended a workshop titled “Clinical Trial Design for Alpha-1 Deficiency: A Model for Rare Diseases”. During the meeting, the N of 1 design was mentioned as one of the study methods to address the challenges in clinical trials in rare disease areas. The order of ex...
onbiostatistics.blogspot.com
On Biostatistics and Clinical Trials: July 2015
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On Biostatistics and Clinical Trials. CQ's web blog on the issues in biostatistics and clinical trials. Tuesday, July 28, 2015. Clinical Research Toolkit by NIH and NCI. NIH (National Institute of Health). Has been the force in conducting the landmark clinical trials and conducting the clinical trials in the disease areas that pharmaceutical companies are either not interested in or cannot afford to conduct the trials. NCI (National Cancer Institute). Various clinical research toolkits are available on N...
onbiostatistics.blogspot.com
On Biostatistics and Clinical Trials: March 2015
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On Biostatistics and Clinical Trials. CQ's web blog on the issues in biostatistics and clinical trials. Monday, March 16, 2015. Commonly Used Clinical Trial Terms in English and Their Chinese Translations; List of Regulatory Guidance for Clinical Trials in China. Some of the translations are different between the mainland China and the Taiwan. 吸收、分布、代谢、清除. Area Under Curve (AUC). Candidate Product (Proposed Product). Company Core Data Sheet (CCDS). Common Technical Document (ICH-CTD). Free Survival ,DFS.
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On Biostatistics and Clinical Trials: October 2014
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On Biostatistics and Clinical Trials. CQ's web blog on the issues in biostatistics and clinical trials. Saturday, October 18, 2014. The fixed margin method or the two confidence interval method for obtaining the non-inferiority margin. As indicated in FDA’s guidance " Non-Inferiority Clinical Trials. There are essentially two approaches to derive the non-inferiority margin:. Or the two confidence interval method). And the other called the synthesis method. 8220;in the fixed margin method, the margin M.
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On Biostatistics and Clinical Trials: Sample Size and Power Calculation Using SAS Proc Power and twosamplesurvival Statement
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On Biostatistics and Clinical Trials. CQ's web blog on the issues in biostatistics and clinical trials. Sunday, June 14, 2015. Sample Size and Power Calculation Using SAS Proc Power and twosamplesurvival Statement. For sample size and power calculations, several commercially available software can be used. The commonly used ones are. The syntax and descriptions for Twosamplesurvival statement. In PROC POWER can be found on SAS website. It can be used to calculate:. Notice that only one. By Bauer, Lavery,...
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On Biostatistics and Clinical Trials: April 2015
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On Biostatistics and Clinical Trials. CQ's web blog on the issues in biostatistics and clinical trials. Sunday, April 19, 2015. Hockey stick effect, yo-yo effect, honeymoon effect, halo effect, Hawthorne effect, John Henry effect, and Pygmalion effect. In clinical trials, people need to pay attention to the various effects in designing the clinical trials. A while ago, I mentioned the. Other these kinds of effects were described below. In a FDA ADCOM meeting minutes. Honeymoon effect is used to describe ...
onbiostatistics.blogspot.com
On Biostatistics and Clinical Trials: Missing Data Mechanisms/Assumptions and the Corresponding Imputation Methods
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On Biostatistics and Clinical Trials. CQ's web blog on the issues in biostatistics and clinical trials. Saturday, August 01, 2015. Missing Data Mechanisms/Assumptions and the Corresponding Imputation Methods. Missing data is one of the classical issues in clinical trials and biostatistics. Since the National Research Council's report on missing data. Missing Data Assumptions and the Corresponding Imputation Methods. Missing Complete at Random. Missing at Random – ignorability assumption. Not MCAR or MAR.
onbiostatistics.blogspot.com
On Biostatistics and Clinical Trials: February 2015
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On Biostatistics and Clinical Trials. CQ's web blog on the issues in biostatistics and clinical trials. Saturday, February 14, 2015. Data Transport Across Different Platforms: Creating and Reading the SAS transport files (.xpt, .cpt, .dat). Since there are different computer platforms (Windows - PC, Unix,. I discussed that for FDA submission, the SAS transport file must be generated using xport engine (i.e, using PROC COPY). Creating .xpt file using PROC COPY. We can also use SAS data step to read the &#...