Preoperative patients’ health decrease moderately, while hospital costs increase for hip and knee replacement due to the first COVID-19 lockdown in Germany

PURPOSE: The purpose of this study was a comparison between osteoarthritis patients with primary hip and knee replacements before, during and after the first COVID-19 lockdown in Germany. Patients’ preoperative health status is assumed to decrease, owing to delayed surgeries. Costs for patients with osteoarthritis were assumed to increase, for example, due to higher prices for protective equipment. Hence, a comparison of patients treated before, during and after the first lockdown is conducted. METHODS: In total, 852 patients with primary hip or knee replacement were included from one hospital in Germany. Preoperative health status was measured with the WOMAC Score and the EQ-5D-5L. Hospital unit costs were calculated using a standardised cost calculation. Kruskal–Wallis tests and Chi-squared tests were applied for the statistical analyses. RESULTS: The mean of the preoperative WOMAC Score was slightly higher (p < 0.01) for patients before the first lockdown, compared with patients afterwards. Means of the EQ-5D-5L were not significantly different regarding the lockdown status (NS). Length of stay was significantly reduced by approximately 1 day (p < 0.001). Total inpatient hospital unit costs per patient and per day were significantly higher for patients during and after the first lockdown (p < 0.001). CONCLUSION: Preoperative health, measured with the WOMAC Score, worsened slightly for patients after the first lockdown compared with patients undergoing surgery before COVID-19. Preoperative health, measured using the EQ-5D-5L, was unaffected. Inpatient hospital unit costs increased significantly with the COVID-19 pandemic. LEVEL OF EVIDENCE: Retrospective cohort study, III. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s00167-022-06904-9.