open access
메뉴
open access
메뉴
ISSN : 0376-4672
The appropriate sample size calculation in dental research is important to achieve the study purpose at the first step in study design. However, it cannot be easy to calculate sample size using standard formulas, because the several factors must be considered for calculation. This study introduced the graphic method for sample size calculation, which is called nomogram. The purpose of this study is to show the effectiveness of the nomogram using examples, expecting the researchers can easily use nomogram for sample size determination.
1. Altman DG. Statistics and ethics in medical research. VII--Interpreting results. Br Med J 1980;281(6255):1612-4.
2. Altman DG, Gore S. Statistics in practice : articles published in the British medical journal. London:British Medical Association; 1982.
3. Faul F, Erdfelder E, Lang AG, Buchner A. G*Power 3: a flexible statistical power analysis program for the social, behavioral, and biomedical sciences. Behav Res Methods2007;39(2):175-91.
4. Cohen J. Statistical power analysis for the behavioral sciences. 2nd ed. Hillsdale, N.J.: L. Erlbaum Associates; 1988.
5. Sandhya Jain AG, Deshraj Jain. Estimation of sample size in dental research. International Dental & Medical Journal of Advanced Research 2015;1:1-6.
6. Petrie A, Bulman JS, Osborn JF, Bulman JS. Further statistics in dentistry. London: British Dental Association; 2002.
7. Jones SR, Carley S, Harrison M. An introduction to power and sample size estimation. Emerg Med J 2003;20(5):453-8.
8. Noordzij M, Tripepi G, Dekker FW, Zoccali C, Tanck MW, Jager KJ. Sample size calculations: basic principles and common pitfalls. Nephrol Dial Transplant 2010;25(5):1388-93.