Abstract
BackgroundDiagnosis of periprosthetic joint infection (PJI) remains a challenge despite a wide variety of available diagnostic tests. The question that arises is which of these tests has a better performance for diagnosing PJI. Diagnostic odds ratio (DOR) has been described as the best indicator for test performance. MethodsTo compare the performance of the standard diagnostic tests, the DOR of serum erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP), synovial fluid (SF) white blood cell (WBC) count, SF polymorphonuclear (PMN%), and leukocyte esterase (LE) were calculated. ResultsWe obtained 4662 ESRs, 4392 CRPs, 836 SF WBC, 804 SF PMN%, and 659 LE results. LE had the highest DOR for diagnosing PJI: 30.06 (95% confidence interval [CI]: 17.8-50.7). The rest of the DORs in the descending order were SF WBC: 29.4 (95% CI: 20.2-42.8), CRP: 25.6 (95% CI: 19.5-33.7), SF PMN%: 25.5 (95% CI: 17.5-37.0), and ESR: 14.6 (95% CI: 11.5-18.6). ConclusionBased on our findings, it appears that among the minor diagnostic criteria, LE has the best performance.
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