Bacterial Findings in Infected Hip Joint Replacements in Patients with Rheumatoid Arthritis and Osteoarthritis: A Study of 318 Revisions for Infection Reported to the Norwegian Arthroplasty Register

Table 3

Distribution of cultured bacteria at revision surgery in infected THR in RA patients versus OA patients.

	RA (𝑛=49)	OA (𝑛=269)	𝑃^∗
Staphylococcus aureus	9 (18%)	30 (11%)	0.16
Coagulase negative staphylococci	9 (18%)	79 (29%)	0.11
Streptococci	1 (2%)	19 (7%)	0.33
Enterococci	1 (2%)	18 (7%)	0.33
Gram negative bacteria	3 (6%)	10 (3%)	0.43
Others	1 (2%)	10 (3%)	1.00
Polymicrobial flora	7 (14%)	20 (7%)	0.11
No growth	18 (37%)	83 (31%)	0.42
Bacteria potentially of oral or dental origin	0	12 (4%)	0.13

^*Chi-square and Fisher’s exact test.