Appendix Table A1.

Search Strategy According to Database

PubMed (324 results): ((((((“Risk Factors”[Mesh]) OR (risk[Title/Abstract])) OR (associated with[Title/Abstract])) OR (correlated with[Title/Abstract])) OR (predictor[Title/Abstract])) AND (((“Anterior Cruciate Ligament”[Mesh]) OR (“Anterior Cruciate Ligament Reconstruction”[Mesh])) OR (((anterior cruciate ligament[Title/Abstract]) OR (anterior cruciate ligament reconstruction[Title/Abstract])) OR (acl[Title/Abstract])))) AND ((“Arthritis, Infectious”[Mesh]) OR ((infection[Title/Abstract]) OR (septic arthritis[Title/Abstract])))

Embase (185 results): 1. ‘risk factor’/exp 2. ‘risk factors’:ab,ti 3. ‘associated with’:ab,ti 4. ‘correlated with’:ab,ti 5. predictors:ab,ti 6. #1 OR #2 OR #3 OR #4 OR #5 7. ‘anterior cruciate ligament’/exp 8. ‘anterior cruciate ligament reconstruction’/exp 9. ‘anterior cruciate ligament’:ab,ti 10. ‘anterior cruciate ligament reconstruction’:ab,ti 11. #7 OR #8 OR #9 OR #10 12. infection:ab,ti 13. ‘septic arthritis’:ab,ti 14. #12 OR #13 15. #6 AND #11 AND #14

Web of Science (325 results): 1. AB=(Risk Factors OR risk OR associated with OR correlated with OR predictor) 2. AB=(anterior cruciate ligament OR anterior cruciate ligament reconstruction OR acl) 3. AB=(infection OR septic arthritis) 4. #3 AND #2 AND #1