Table 1 Exclusion criteria for the title, abstract, and paper-level screening of articles retrieved from the PubMed search

• Focus on wrong procedure

e.g. total knee arthroplasty

• Focus on risk factors for primary THA

as opposed to risk of revision of THA

• Focus on outcomes of revision THA surgery

as opposed to risk of revision of primary THA

• No living human subjects

e.g. canine or simulation study

• Focus on non-standard THA

e.g. hip resurfacing

• Focus on THA to address hip fracture

as opposed to THA for hip arthritis

• Focus on non-prosthesis THA outcome

e.g. mortality

• Focus on prosthesis-related non-revision outcome

e.g. polyethylene wear

• Focus on stem or cup failure only*

as opposed to revision of any component

• Focus on specific brand comparison only⁺

no other comparisons reported

• Sample has less than 2,500 person-years

at the title level, case studies were excluded

• Study includes no new clinical data*

e.g. literature review

• Study does not report a comparative risk metric⁺

e.g. no odds ratio or multiple survival curves

• Article could not be retrieved⁺

not available in electronic or print archives