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JOURNAL ARTICLE

Surgical Approaches in Total Hip Arthroplasty Cost Per Case Analysis: A Retrospective, Matched, Micro-costing Analysis in a Socialised Healthcare System

Rajrishi Sharma, Irafan Abdulla, Lewis Fairgrieve-Park, Saboura Mahdavi, Brian Burkart, Jeffrey Bakal
Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy 2019 April 2, : 1120700019839039
30938177

BACKGROUND: Total hip arthroplasty (THA) offers an effective method of pain relief and restoration of function for patients with end-stage arthritis. The anterior approach (AA) claims to benefit patients with decreased pain, increased mobilisation and decreasing length of hospital stay (LOS). In a socialised healthcare platform we questioned whether the AA, compared to posterior (PA) and lateral (LA) approaches, can decrease the cost burden.

METHODS: Using a retrospective matched cohort study, we matched 69 AA patients to 69 LA and 69 PA patients for age ( p = 0.99), gender ( p = 0.99) and number of pre-surgical risk factors ( p = 0.99). First, we used the Resource Intensity Weights (RIW) using the Health Services agreed on method of calculating cost. Secondly, micro-costing analysis was performed using the financial services data for each patient's hospital stay.

RESULTS: Using the RIW based cost analysis and 2-day reduction (95% CI 1.8-2.4) in LOS, the AA offers an estimated savings per case of $4099 ( p < 0.001) compared to the LA and PA. Using micro-costing analysis, we found a total saving of $1858.00 per case (95% CI 1391-2324) when comparing the AA to the PA and LA. There was a statistically significant cost savings using every category: Net Direct Salary ($901.00, p < 0.001), Net Drug ($8.00, p = 0.003), Patient Supply ($454.00, p = 0.001), Patient Drug ($15.00, p = 0.008), Indirect Cost ($385.00, p < 0.001), Patient Care Administration ($106.00, p < 0.001). Furthermore, the AA saved 142 minutes of in-hospital rehabilitation time.

CONCLUSION: The AA THA provides statistically significant reductions in cost compared to PA and LA while releasing rehabilitation resources.

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