Study Examines Outcomes After Septic Arthritis of the Native Knee
A retrospective study published in the March issue of The Lancet Infectious Diseases assessed short- and long-term mortality and adverse joint outcomes following septic arthritis of the native knee. The Hospital Episode Statistics database was queried for patients treated with arthroscopic knee washout for septic arthritis between April 1, 1997, and March 31, 2017. Outcomes were 90-day mortality; one-year rates of arthrodesis, amputation, and arthroplasty; and 15-year arthroplasty. Final analysis included 12,132 patients (mean age, 56.6 years; 36.0 percent were female). There were 10,195 patients who had septic arthritis as their primary admitting diagnosis; in this group, 90-day mortality was 7.05 percent, and it increased to 22.69 percent in patients aged older than 79 years. Patients with secondary septic arthritis, compared to those with a primary diagnosis, had an adjusted odds ratio for mortality of 2.10. Of 11,393 patients with at least one year of follow-up, the one-year rates of arthrodesis, amputation, and arthroplasty were 0.13 percent, 0.40 percent, and 1.33 percent, respectively. Of 1,816 patients with 15-year follow-up, 8.76 percent received arthroplasty.
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