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  • Sample size: How many is enough?

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    83704_1.pdf (347.4Kb)
    Author(s)
    Burmeister, Elizabeth
    Aitken, Leanne M
    Griffith University Author(s)
    Aitken, Leanne M.
    Burmeister, Elizabeth
    Year published
    2012
    Metadata
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    Abstract
    Sample size is an element of research design that significantly affects the validity and clinical relevance of the findings identified in research studies. Factors that influence sample size include the effect size, or difference expected between groups or time points, the homogeneity of the study participants, the risk of error that investigators consider acceptable and the rate of participant attrition expected during the study. Appropriate planning in regard to each of these elements optimises the likelihood of finding an important result that is both clinically and statistically meaningful.Sample size is an element of research design that significantly affects the validity and clinical relevance of the findings identified in research studies. Factors that influence sample size include the effect size, or difference expected between groups or time points, the homogeneity of the study participants, the risk of error that investigators consider acceptable and the rate of participant attrition expected during the study. Appropriate planning in regard to each of these elements optimises the likelihood of finding an important result that is both clinically and statistically meaningful.
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    Journal Title
    Australian Critical Care
    Volume
    25
    Issue
    4
    DOI
    https://doi.org/10.1016/j.aucc.2012.07.002
    Copyright Statement
    © 2012 ACCCN. Published by Elsevier. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal website for access to the definitive, published version.
    Subject
    Clinical sciences
    Nursing
    Acute care
    Publication URI
    http://hdl.handle.net/10072/51545
    Collection
    • Journal articles

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