Journal of Human Reproductive Science
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Year : 2011  |  Volume : 4  |  Issue : 1  |  Page : 8-11

An overview of randomization techniques: An unbiased assessment of outcome in clinical research

Department of Biostatics, National Institute of Animal Nutrition & Physiology (NIANP), Adugodi, Bangalore, India

Date of Submission08-Mar-2011
Date of Decision08-Mar-2011
Date of Acceptance08-Mar-2011
Date of Web Publication28-Jun-2011

Correspondence Address:
K P Suresh
Scientist (Biostatistics) National Institute of Animal Nutrition and Physiology (NIANP) Adugodi, Bangalore - 560030
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0974-1208.82352

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Randomization as a method of experimental control has been extensively used in human clinical trials and other biological experiments. It prevents the selection bias and insures against the accidental bias. It produces the comparable groups and eliminates the source of bias in treatment assignments. Finally, it permits the use of probability theory to express the likelihood of chance as a source for the difference of end outcome. This paper discusses the different methods of randomization and use of online statistical computing web programming ( or to generate the randomization schedule. Issues related to randomization are also discussed in this paper.

Keywords: Block, graphpad quickcalc, patient, randomization

How to cite this article:
Suresh K P. An overview of randomization techniques: An unbiased assessment of outcome in clinical research. J Hum Reprod Sci 2011;4:8-11

How to cite this URL:
Suresh K P. An overview of randomization techniques: An unbiased assessment of outcome in clinical research. J Hum Reprod Sci [serial online] 2011 [cited 2021 Aug 3];4:8-11. Available from:

In the article titled, "An overview of randomization techniques: An unbiased assessment of outcome in clinical research", which was published in pages 8-11, Issue 1, Vol. 4 of Journal of Human Reproductive Sciences1, overlap of text has been found with a previously published article, titled, "Issues in outcomes research: an overview of randomization techniques for clinical trials.", in pages 215-221, Issue 2, Vol. 45 of Journal of Athletic Training2. Thus owing to duplicity of text, the article is being retracted.

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