Data extraction plan

Study characteristics • Author • Year • Country • Athlete level • Sample size • Follow-up duration Injury outcome measurement • Injury definition (time-loss / medical attention / all complaints) • Overuse inclusion? (yes/no) • Mode of onset classification • Recurrence definition • Severity classification Exposure measurement • Hours • Sessions • Distance • Athlete-exposures • Competition only vs full season Risk factor measurement • Risk factor type (modifiable/non-modifiable) • How measured (self-report / objective / wearable / medical diagnosis) • Time-varying or baseline only • Categorised or continuous Statistical modelling • Logistic regression • Cox regression • Multilevel models • Adjustment for: o Previous injury o Sex o Training load o Event group Consensus adherence checklist For each study, assess: • Used standard injury definition? (Yes/No) • Reported exposure clearly? (Yes/No) • Distinguished sudden vs gradual onset? • Defined recurrence properly? • Reported event classification? • Used recommended incidence denominator? Score as: • Full adherence • Partial adherence • Non-adherence