- Considerations when calculating the sample size for an inequality test
-
In J
- KMID: 2344597
- Korean J Anesthesiol.
- 2016 Aug;69(4):327-331.
- doi: 10.4097/kjae.2016.69.4.327
Calculating the sample size is a vital step during the planning of a study in order to ensure the desired power for detecting clinically meaningful differences. However, estimating the sample... -
- CITED
-
- Close
- SHARE
-
- Close
- How to Calculate Sample Size and Why
-
Kim J, Seo BS
- KMID: 1705551
- Clin Orthop Surg.
- 2013 Sep;5(3):235-242.
- doi: 10.4055/cios.2013.5.3.235
WHY: Calculating the sample size is essential to reduce the cost of a study and to prove the hypothesis effectively. HOW: Referring to pilot studies and previous research studies, we can... -
- CITED
-
- Close
- SHARE
-
- Close
- Calculation of Sample Size in Clinical Trials
-
Lee HJ, Kim YS, Park I
- KMID: 2049399
- Clin Should Elbow.
- 2013 Jun;16(1):53-57.
PURPOSE: This review aims to explain the definition and basic principle of statistical analysis and to clarify statistical issues related to the sample size calculation. MATERIALS AND METHODS: Many formulas are... -
- CITED
-
- Close
- SHARE
-
- Close
- More about the basic assumptions of t-test: normality and sample size
-
Kim TK, Park JH
- KMID: 2458317
- Korean J Anesthesiol.
- 2019 Aug;72(4):331-335.
- doi: 10.4097/kja.d.18.00292
Most parametric tests start with the basic assumption on the distribution of populations. The conditions required to conduct the t-test include the measured values in ratio scale or interval scale,... -
- CITED
-
- Close
- SHARE
-
- Close
- A Review on the Methods of Sample Size Determination in Nursing Research
-
Lee JW, Park MR, Lee JB, Lee SJ, Park ES, Park YJ
- KMID: 2327765
- J Korean Acad Womens Health Nurs.
- 1998 Dec;4(3):375-387.
In clinical trials of nursing research, the sample size determination is one of the most important factor. Although sample size must be considered at the design stage, it has been... -
- CITED
-
- Close
- SHARE
-
- Close
- Sample Size Estimation for Log-Rank Test for Phase III Clinical Trials
-
Jung SH, Choi JH, Park BJ
- KMID: 2304077
- Korean J Epidemiol.
- 1997 Jun;19(1):67-72.
At first, we review a sample size estimation method for log-rank test in survival analysis. Although it is widely used these days, it has a weakness for practical use. We... -
- CITED
-
- Close
- SHARE
-
- Close
- Understanding Effect Sizes
-
Nahm FS
- KMID: 2149103
- Hanyang Med Rev.
- 2015 Feb;35(1):40-43.
- doi: 10.7599/hmr.2015.35.1.40
In most medical research the P value is commonly used to describe test results. Because the power of statistical test is influenced by sample size, the null hypothesis can be... -
- CITED
-
- Close
- SHARE
-
- Close
- Sample size determination for repeated measures design using G Power software
-
Kang H
- KMID: 2148051
- Anesth Pain Med.
- 2015 Jan;10(1):6-15.
- doi: 10.17085/apm.2015.10.1.6
Repeated measures designs are widely used in the field of anesthesiology because they allow the detection of within-person change over time and provide a higher statistical power for detecting differences... -
- CITED
-
- Close
- SHARE
-
- Close
- Statistical notes for clinical researchers: Sample size calculation 1. comparison of two independent sample means
-
Kim HY
- KMID: 2316967
- Restor Dent Endod.
- 2016 Feb;41(1):74-78.
- doi: 10.5395/rde.2016.41.1.74
No abstract available. -
- CITED
-
- Close
- SHARE
-
- Close
- Estimating Sample Size in Clinical Trials
-
Kim H
- KMID: 2091658
- Korean J Anesthesiol.
- 2002 Jan;42(1):1-10.
- doi: 10.4097/kjae.2002.42.1.1
No abstract available -
- CITED
-
- Close
- SHARE
-
- Close
- Sample Size and Power Estimation in Case-Control Genetic Association Studies
-
Ahn C
- KMID: 2166209
- Genomics Inform.
- 2006 Jun;4(2):51-56.
In planning a genetic association study, it is necessary to determine the number of samples to be collected for the study in order to achieve sufficient power to detect the... -
- CITED
-
- Close
- SHARE
-
- Close
- Statistical notes for clinical researchers: Sample size calculation 2. Comparison of two independent proportions
-
Kim HY
- KMID: 2163299
- Restor Dent Endod.
- 2016 May;41(2):154-156.
- doi: 10.5395/rde.2016.41.2.154
No abstract available. -
- CITED
-
- Close
- SHARE
-
- Close
- A Review on the Use of Effect Size in Nursing Research
-
Kang H, Yeon K, Han ST
- KMID: 2363089
- J Korean Acad Nurs.
- 2015 Oct;45(5):641-649.
- doi: 10.4040/jkan.2015.45.5.641
PURPOSE: The purpose of this study was to introduce the main concepts of statistical testing and effect size and to provide researchers in nursing science with guidance on how to... -
- CITED
-
- Close
- SHARE
-
- Close
- Statistical notes for clinical researchers: Sample size calculation 3. Comparison of several means using one-way ANOVA
-
Kim HY
- KMID: 2346773
- Restor Dent Endod.
- 2016 Aug;41(3):231-234.
- doi: 10.5395/rde.2016.41.3.231
No abstract available. -
- CITED
-
- Close
- SHARE
-
- Close
- A Review of Power and Sample Size Estimation in Genomewide Association Studies
-
Park AK, Kim H
- KMID: 1125672
- J Prev Med Public Health.
- 2007 Mar;40(2):114-121.
- doi: 10.3961/jpmph.2007.40.2.114
Power and sample size estimation is one of the crucially important steps in planning a genetic association study to achieve the ultimate goal, identifying candidate genes for disease susceptibility, by... -
- CITED
-
- Close
- SHARE
-
- Close
- Sample Size and Statistical Power Calculation in Genetic Association Studies
-
Hong EP, Park JW
- KMID: 2166494
- Genomics Inform.
- 2012 Jun;10(2):117-122.
- doi: 10.5808/GI.2012.10.2.117
A sample size with sufficient statistical power is critical to the success of genetic association studies to detect causal genes of human complex diseases. Genome-wide association studies require much larger... -
- CITED
-
- Close
- SHARE
-
- Close
- Usage of Statistics in Clinical Trials
-
Ahn HY
- KMID: 2305363
- Korean J Hosp Palliat Care.
- 2010 Mar;13(1):1-6.
The purpose of clinical trials is to find evidences for the effects of experimental new drugs or treatments on human. For the successful clinical trials, it is not sufficient to... -
- CITED
-
- Close
- SHARE
-
- Close
- The Effect of Increasing Control-to-case Ratio on Statistical Power in a Simulated Case-control SNP Association Study
-
Kang M, Choi S, Koh I
- KMID: 1469573
- Genomics Inform.
- 2009 Sep;7(3):148-151.
Generally, larger sample size leads to a greater statistical power to detect a significant difference. We may increase the sample size for both case and control in order to obtain... -
- CITED
-
- Close
- SHARE
-
- Close
- Development of a Web-based Program to Calculate Sample Size for Evaluating the Performance of In Vitro Diagnostic Kits
-
Hwang SH, Oh HB, Chae JM, Seo MK, Jung SY, Choi SE, Lee KJ
- KMID: 2238839
- Korean J Lab Med.
- 2006 Aug;26(4):299-306.
- doi: 10.3343/kjlm.2006.26.4.299
BACKGROUND: Many studies evaluating the performance of in vitro diagnostic kits have been criticized for the lack of reliability. To attain reliability those evaluation studies should be preceded by sample... -
- CITED
-
- Close
- SHARE
-
- Close
- T test as a parametric statistic
-
Kim TK
- KMID: 2237303
- Korean J Anesthesiol.
- 2015 Dec;68(6):540-546.
- doi: 10.4097/kjae.2015.68.6.540
In statistic tests, the probability distribution of the statistics is important. When samples are drawn from population N (micro, sigma2) with a sample size of n, the distribution of the... -
- CITED
-
- Close
- SHARE
-
- Close
