• Fatih Yıldız, Orkhan Aliyev, Tunay Erden, Nurdan Güngören, Vahdet Uçan, and İbrahim Tuncay.
• Department of Orthopaedics and Traumatology, Bezmialem Vakıf University, İskender Paşa Mh Adnan Menderes Bulvarı, Adnan Menderes Blv., Fatih, 34093, Istanbul, Turkey. yildizfatih@hotmail.com.
• Arch Orthop Trauma Surg. 2021 Feb 1; 141 (2): 321-326.

PurposeDoes performing total joint arthroplasty in the afternoon or evening increase the rate of early prosthetic joint infection and the likelihood of early prosthetic joint infection?MethodsWe evaluated patients retrospectively, who underwent primary total hip (THA) or knee arthroplasty (TKA) between January 2016 and December 2019, met the inclusion criteria and had at least 90 days of follow-up. Patients were divided into two groups. Group I consisted of patients whose surgeries had been started and finished before 14:00, and group II included patients whose surgeries started after 14:01. All patients were operated after non-septic cases in specific orthopedic operating rooms. Their demographic data and comorbidities were noted. Primary outcome was to compare the risk of PJI between the groups.ResultsGroup I and group II included 2309 and 1881 patients. Total number of patients with the diagnosis of PJI was 58 (1.4%). It was 31 (1.3%) and 27 (1.4%), respectively (p = 0.79). Performing total joint arthroplasty after 14:01 did not increase likelihood of infection (p = 0.83, OR 1.03). Among the parameters, PJI was significantly associated with age (p < 0.01, OR 0.99), smoking status (p < 0.01, OR 0.15) and operating time (p = 0.04, OR 0.99) in TKA and with direct anterior approach (p = 0.02, OR 4.72) in THA. Age (p = 0.06, OR 1.03) was the factor affecting the risk of subsequent PJI after total joint arthroplasty.ConclusionPerforming total joint arthroplasty in the afternoon or in the evening, after aseptic cases does not increase the risk of subsequent of PJI.

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