Author Contributions: Drs Sulheim, Holme, and Bahr had full access to all of the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis.
Study concept and design: Sulheim, Ekeland, Bahr.
Acquisition of data: Sulheim, Ekeland, Bahr.
Analysis and interpretation of data: Sulheim, Holme, Bahr.
Drafting of the manuscript: Sulheim, Holme, Bahr.
Critical revision of the manuscript for important intellectual content: Sulheim, Holme, Ekeland, Bahr.
Statistical analysis: Sulheim, Holme, Bahr.
Obtained funding: Ekeland, Bahr.
Study supervision: Ekeland, Bahr.
Financial Disclosures: None reported.
Funding: The Oslo Sports Trauma Research Center has been established at the Norwegian School of Sport Sciences through grants from the Norwegian Eastern Health Corporate, the Royal Norwegian Ministry of Culture, the Norwegian Olympic Committee & Confederation of Sport, Norsk Tipping AS, and Pfizer AS. Data collection was funded by the Norwegian Ski Lift Association.
Role of the Sponsor: No funding agency has been involved in the design and conduct of the study; data analysis or interpretation; manuscript preparation or review.
Acknowledgment: We are indebted to Andreas Rødven, the Norwegian Ski Lift Association and the ski patrols at the various resorts for recording injuries and interviewing the control group.