Abstract: Medical instrument clinical trial is to evaluate the clinical safety of the human body, the validity of the preliminary test. With the rapid development of science and technology, research and development of medical devices is increasing year by year, improving the medical clinical trial level is more important. Medical statistics is to ensure that the clinical trial design scientific, reasonable. SAS is important software in statistical analysis of medical instrument clinical trial. This article mainly introducing the correctly understand and choose in statistical results, so as to make statistical analysis more accurate and scientific.

Key words: SAS, medical instrument, clinical trial, statistical analysis