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Paper Information

Journal:   MEDICAL JOURNAL OF THE ISLAMIC REPUBLIC OF IRAN (MJIRI)   2017 , Volume 31 , Number 1; Page(s) 0 To 0.
 
Paper: 

Important considerations in calculating and reporting of sample size in randomized controlled trials

 
DOI: 

10.14196/mjiri.31.127

 
Author(s):  EBRAHIM VALOJERDI AMENEH, Tanha Kiarash, JANANI LEILA*
 
* Department of Biostatistics, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
 
Abstract: 
Background: The calculation of the sample size is one of the most important steps in designing a randomized controlled trial. The purpose of this study is drawing the attention of researchers to the importance of calculating and reporting the sample size in randomized controlled trials. Methods: We reviewed related literature and guidelines and discussed some important issues in sample size calculation and reporting in randomized controlled trials. Conclusion: The calculation of the sample size is one of the most important steps in designing a randomized controlled trial. According to the CONSORT (Consolidated Standards of Reporting Trials) guideline and other standard guidelines for designing and reporting of RCTs, sample size calculations should be reported and justified in all published RCTs. Because sample size calculations are prone to bias and because of the high ethical and financial costs related to conducting an RCT, we recommend involving a biostatistician at the designing stage of the study and to ask for statistical advice for sample size calculations.
 
Keyword(s): Randomized controlled trials (RCTs),Sample size,Post hoc power
 
 
References: 
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+ Click to Cite.
APA: Copy

EBRAHIM VALOJERDI, A., & Tanha, K., & JANANI, L. (2017). Important considerations in calculating and reporting of sample size in randomized controlled trials. MEDICAL JOURNAL OF THE ISLAMIC REPUBLIC OF IRAN (MJIRI), 31(1), 0-0. https://www.sid.ir/en/journal/ViewPaper.aspx?id=663477



Vancouver: Copy

EBRAHIM VALOJERDI AMENEH, Tanha Kiarash, JANANI LEILA. Important considerations in calculating and reporting of sample size in randomized controlled trials. MEDICAL JOURNAL OF THE ISLAMIC REPUBLIC OF IRAN (MJIRI). 2017 [cited 2021May16];31(1):0-0. Available from: https://www.sid.ir/en/journal/ViewPaper.aspx?id=663477



IEEE: Copy

EBRAHIM VALOJERDI, A., Tanha, K., JANANI, L., 2017. Important considerations in calculating and reporting of sample size in randomized controlled trials. MEDICAL JOURNAL OF THE ISLAMIC REPUBLIC OF IRAN (MJIRI), [online] 31(1), pp.0-0. Available: https://www.sid.ir/en/journal/ViewPaper.aspx?id=663477.



 
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