Abstract
Causation concepts for work-related musculoskeletal disorders vary among authors and academic disciplines. The major causation concepts are single-event and repetitive motion. The aim of this short communication is to share findings from a recent survey of United States employers conducted by the U.S. Bureau of Labor Statistics about work-related musculoskeletal cases, and, more specifically, about whether the employers regard the causes of their employees' musculoskeletal problems as being from a single exposure or from multiple exposures. Recommendations are offered for using terminology consistent with employer understandings.