Review Question - QID 217480

As part of your professional responsibilities, you provide team coverage for a local semi-professional soccer team. The team's equipment sponsor offers two footwear options, with one utilizing a new cleat design. Your athletic trainer mentions that he has heard reports that this cleat design increases the risk of anterior cruciate ligament (ACL) injury. You decide to conduct a study in which you will report the incidence of ACL injury among athletes wearing either the classic cleat design or the new cleat design, after allowing the athletes to chose their own footwear. You will initiate the study before the season starts and follow the athletes over the course of the season. Which of the following represents the level of evidence of this study?