"Only 50% of randomized trials have high level of confidence in arthroscopy and sports medicine"-a spin-based assessment.

Purpose: Pioneering works on the quality appraisal of RCTs have recognized and addressed most of the issues that affect the RCT quality but some issues such as "Writers' bias" or "Spin" are yet to be sorted out. Spin, particularly in the abstracts, is a potential source of deception to the readers. The purpose of this study is to grade the RCTs of arthroscopy and sports medicine based on a spin in their abstracts, analyze the prevalence of spin, and explore methods to remove spin.