Six statistical suggestions for surgeons.

Statistical analysis has become very important in medical research. The large number and variety of statistical techniques required to appropriately handle different types of medical research make it impossible for most physicians to acquire enough statistical expertise to analyze critically the details of many reports. However, a basic understanding of certain fundamental principles of statistical analysis is vital if statistical errors and misapplications are to be identified and prevented. The basic principles underlying six common statistical errors are discussed and a guide to pertinent literature is provided so that the practicing physician without special statistical knowledge can be in a better position to understand and interpret statistical analysis in the medical literature.