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- Jon Karlsson, Lars Engebretsen, Katie Dainty, and ISAKOS Scientific Committee.
- Sahlgrenska University Hospital/Ostra, Gothenburg, Sweden.
- Arthroscopy. 2003 Nov 1; 19 (9): 997-9.
AbstractMany studies in orthopaedics and sports medicine have not considered sample size or statistical power as important issues in study design. This article addresses the importance of a sample size calculation in randomized clinical trials and the components of the calculations that researchers must consider in their preliminary planning of an investigation. The types of data being collected, level of significance, types I and II errors, and power are also addressed.
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