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The impact of robotic-assisted total knee arthroplasty (rTKA) vs. traditional, manual TKA (mTKA) on hospital costs is not well documented and is analyzed herein. Patients in the Premier billing Healthcare Database undergoing elective rTKA or mTKA (“index’) in the in- or outpatient setting for knee osteoarthritis between Oct 1 st , 2015, to September 30th, 2021, were identified. Variables included patient demographics and comorbidities and hospital characteristics. Matched rTKA vs. mTKA cohorts were created using direct (on provider characteristics, age, gender, race and Elixhauser index) and propensity score matching (fixation type, comorbidities). Index and 90-day inflation-adjusted costs and healthcare utilization (HCU) were analyzed for both cohorts, using generalized linear models. 16,714 rTKA patients were matched to 51,199 mTKA patients. Average 90-day hospital cost reached $17,932 and were equivalent for both cohorts (rTKA vs. mTKA: $132 (95% confidence interval; -$19 to $284). There was a 2.7% (95%CI: 2.2%-3.3%) increase in home or home health discharge, and a 0.4% (95%CI: 0%-0.8%) decrease in 90-day hospital knee related re-visit in the rTKA vs. mTKA group. Cost-neutrality of rTKA vs. mTKA was observed, with a potential for lowered immediate post-operative HCU in the rTKA vs. mTKA cohorts.

Resource utilization and costs for robotic-assisted and manual total knee arthroplasty – a premier healthcare database study