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Adaptive sample size determination for the development of clinical prediction models [PDF]

open access: goldDiagnostic and Prognostic Research, 2021
Background We suggest an adaptive sample size calculation method for developing clinical prediction models, in which model performance is monitored sequentially as new data comes in.
Evangelia Christodoulou   +6 more
doaj   +5 more sources

Sample size determination with a pilot study [PDF]

open access: yesPLoS ONE, 2022
We analyse standard confidence intervals for the mean of a finite population, with a view to sample size determination. We first consider a standard method for sample size determination based on the assumption of knowledge of the population variance ...
Ben O’Neill
doaj   +4 more sources

Sample size determination: A practical guide for health researchers [PDF]

open access: yesJournal of General and Family Medicine, 2023
Although sample size calculations play an essential role in health research, published research often fails to report sample size selection. This study aims to explain the importance of sample size calculation and to provide considerations for ...
Alaa Althubaiti
doaj   +3 more sources

Sample size determination and power analysis using the G*Power software [PDF]

open access: yesJournal of Educational Evaluation for Health Professions, 2021
Appropriate sample size calculation and power analysis have become major issues in research and publication processes. However, the complexity and difficulty of calculating sample size and power require broad statistical knowledge, there is a shortage of
Hyun Kang
doaj   +3 more sources

Sample size determination for Bayesian ANOVAs with informative hypotheses [PDF]

open access: goldFrontiers in Psychology, 2022
Researchers can express their expectations with respect to the group means in an ANOVA model through equality and order constrained hypotheses. This paper introduces the R package SSDbain, which can be used to calculate the sample size required to ...
Qianrao Fu   +2 more
doaj   +3 more sources

Sample size determination for point-of-care COVID-19 diagnostic tests: a Bayesian approach [PDF]

open access: greenDiagnostic and Prognostic Research, 2023
Background In a pandemic setting, it is critical to evaluate and deploy accurate diagnostic tests rapidly. This relies heavily on the sample size chosen to assess the test accuracy (e.g.
S. Faye Williamson   +3 more
doaj   +5 more sources

Sample size determination for mediation analysis of longitudinal data [PDF]

open access: yesBMC Medical Research Methodology, 2018
Background Sample size planning for longitudinal data is crucial when designing mediation studies because sufficient statistical power is not only required in grant applications and peer-reviewed publications, but is essential to reliable research ...
Haitao Pan   +3 more
doaj   +3 more sources

An elaboration on sample size determination for correlations based on effect sizes and confidence interval width: a guide for researchers [PDF]

open access: yesRestorative Dentistry & Endodontics
ObjectivesThis paper aims to serve as a useful guide for sample size determination for various correlation analyses that are based on effect sizes and confidence interval width.Materials and MethodsSample size determinations are calculated for Pearson’s ...
Mohamad Adam Bujang
doaj   +3 more sources

Sample size determination for training set optimization in genomic prediction. [PDF]

open access: yesTheor Appl Genet, 2023
Key message A practical approach is developed to determine a cost-effective optimal training set for selective phenotyping in a genomic prediction study. An R function is provided to facilitate the application of the approach. Abstract Genomic prediction
Wu PY, Ou JH, Liao CT.
europepmc   +2 more sources

A Step-by-Step Process on Sample Size Determination for Medical Research. [PDF]

open access: yesMalays J Med Sci, 2021
Determination of a minimum sample size required for a study is a major consideration which all researchers are confronted with at the early stage of developing a research protocol.
Bujang MA.
europepmc   +2 more sources

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