Anti-rheumatic treatment and prosthetic joint infection: an observational study in 494 elective hip and knee arthroplasties

Table 2 Patients characteristics. Values are number (percentage) unless otherwise indicated

All	494
Female	377 (76.3)
TKA¹	254 (51.4)
THA²	240 (48.6)
Age, by time of surgery, mean (range)	62.4 (18–89)
ASA³, valid no 451
ASA 1	9 (2)
ASA 2	268 (59.4)
ASA 3	172 (38.1)
ASA 4	2 (0.4)
BMI⁴, kg/m², valid no 474, mean (range)	26.5 (14.9–44.6)
Diagnosis
Rheumatoid arthritis^a	341 (69)
Psoriatic arthritis	35 (7)
Spondyloarthritis incl. Ankylosing spondylitis^b	29 (5.9)
Juvenile idiopathic arthritis^c	59 (11.9)
Other diagnosis^d	30 (6.1)

¹Total knee-arthroplasty, ²Total hip-arthroplasty, ³American Society of Anesthesiologists (ASA) Physical Status, ⁴Body mass index
^aSeropositive rheumatoid arthritis (n = 283), seronegative rheumatoid arthritis (n = 58)
^bAnkylosing spondylitis (n = 21), other specified inflammatory spondylopathies (n = 6), inflammatory spondylopathy, unspecified (n = 2)
^cjuvenile arthritis (n = 40), juvenile arthritis with systemic onset (n = 7), juvenile polyarthritis (seronegative) (n = 6), juvenile arthritis, unspecified (n = 4), pauciarticular juvenile rheumatoid arthritis (n = 2)
^dInflammatory polyarthropathy (n = 1), polyarthritis, unspecified (n = 4), other specified arthritis (n = 4), monoarthritis, not elsewhere classified (n = 2), systemic lupus erythematosus, unspecified (n = 5), systemic lupus erythematosus with organ or system involvement (n = 3), adult-onset Still disease (n = 2), Crohn’s disease (n = 1), ulcerative colitis (n = 1), polymyositis (n = 1), systemic sclerosis (n = 2), other overlap syndrome (n = 1), arthritis unspecified (n = 1), systemic involvement of connective tissue, unspecified (n = 2)

ISSN: 1471-2474