Black shading represents ‘Yes’ (score of 2); grey shading represents ‘Partial’ (score of 1); white (no shading) represents ‘No’ or ‘Unable to determine’ (score of 0); diagonally lined represents ‘Not applicable’ (items removed from scoring.

H, high quality; L, low quality; M, moderate quality; PFOA, patellofemoral osteoarthritis; PFP, patellofemoral pain.