Table 1.

Abbreviated search strategy with concepts for the search in the header rows, and search terms for each concept listed below

Rheumatoid arthritis	AND	Total hip replacement	AND	Rates	AND	Adult
Rheumatoid arthritis OR Rheumatic disease		Total hip replacements OR Total hip arthroplasty/total hip arthroplasties OR Total hip implantation(s) OR Hip prosthesis implantation		Rate(s) OR Incidence OR Prevalence OR Trend(s) OR Epidemiology		Adult OR Aged OR Middle-aged

Each column is representative of the parenthesis used in the search, with terms combined using Boolean operators (AND and OR) as shown. For the full search strategy (how it was entered into the MEDLINE database), please see the supplementary material