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Background: There is no report yet on the application of telemedicine in orthopedic practice in Japan With a focus on patients with KOA, we investigated the willingness of patients to use telemedicine by assessing factors such as the patient’s age, smartphone possession, hospital visiting time, and severity of KOA Methods: Data of patients who regularly consulted orthopedic surgeons at our institutions from April 2020 to June 2020 were retrospectively analyzed using an electronic medical database The patients were diagnosed with KOA according to clinical and radiological findings, according to the Kellgren-Lawrence (KL) classification included were patients with KOA with KL classification above grade 2 All patients were asked: 1) whether they were willing to use telemedicine (Yes or No), 2) the reason why they answered Yes, 3) the reason why they answered No, 4) if they possessed a smartphone, 5) their numeric rating scale for pain at their last outpatient visit after the Sars-CoV-2 epidemic emerged, and 6) the time required for visiting hospital from their house Patients were stratified into 2 groups depending on whether they answered Yes (Group Y) or No (group N) Comparisons between the groups concerning smartphone possession, NRS pain, hospital visiting times, and distribution of KL grade were made Results: Only 36 7% of the patients with KOA said they were willing to use telemedicine The average age of group Y was significantly younger than that of group N (67 9 ± 9 1 vs 73 1 ± 8 0, P = 0 0026) and the cutoff age was 70 0 years In addition, the rate of smartphone possession was significantly higher in group Y than in group N (82 5% vs 34 5%, P < 0 001) Hospital visit times and the severity of KOA did not differ between the groups Conclusion: Age is a barrier to the adoption of telemedicine © The Author(s) 2020
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