Impact of pre-operative recreational marijuana use on outcomes two years after orthopaedic surgery.

Purpose: The purpose of this study was to investigate the relationship between recreational marijuana use and patient-reported outcomes two years after orthopaedic surgery. We hypothesized that pre-operative recreational marijuana use would be associated with less pain, better function, and better mental health measures two years after orthopaedic surgery.

Methods: Patients were retrospectively analyzed from a prospective orthopaedic registry at a single urban institution.