One, two, three: portable sample size in agricultural research

Comparing two Formulas of Sample Size Determination for Prevalence Studies

Background and purpose: Sample size and its determination is one of the most important problems in health researches. Calculating sample size for prevalence studies is one of the common questions of sample size topics. Minimum sample size with least complexity is desirable in order to achieve the basic goal of these studies. This study aims to compare two formulas of sample size calculation for...

Heart size: one-, two- and now three-dimensional echocardiography.

Sample size determinations in original research

Objectives To assess the completeness of reporting of sample size determinations in unpublished research protocols and to develop guidance for research ethics committees and for statisticians advising these committees. Design Review of original research protocols. Study selection Unpublished research protocols for phase IIb, III, and IV randomised clinical trials of investigational medicinal pr...

Sample size calculations in clinical research.

The specific goal of this (2nd edition) book continues to be to provide a comprehensive and unified presentation regarding sample size calculations in a variety of clinical research and development phases and to serve as a solid reference for researchers in academia, industry, and government. The book has been expanded, by around 100 pages, from its original 12 chapters to its current 15 chapte...

Sample size estimation in epidemiologic studies

This review basically provided a conceptual framework for sample size calculation in epidemiologic studies with various designs and outcomes. The formula requirement of sample size was drawn based on statistical principles for both descriptive and comparative studies. The required sample size was estimated and presented graphically with different effect sizes and power of statistical test at 95...