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MISCELLANEOUS - STATISTICS
Year : 2015  |  Volume : 1  |  Issue : 3  |  Page : 285-288

Preeminence and prerequisites of sample size calculations in clinical trials


Central Council for Research in Ayurvedic Sciences, Ministry of AYUSH, Government of India, New Delhi, India

Correspondence Address:
Richa Singhal
Central Council for Research in Ayurvedic Sciences, Ministry of AYUSH, Government of India, Janakpuri, New Delhi
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/2395-5414.177301

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The key components while planning a clinical study are the study design, study duration, and sample size. These features are an integral part of planning a clinical trial efficiently, ethically, and cost-effectively. This article describes some of the prerequisites for sample size calculation. It also explains that sample size calculation is different for different study designs. The article in detail describes the sample size calculation for a randomized controlled trial when the primary outcome is a continuous variable and when it is a proportion or a qualitative variable.


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