Objective: To undertake a cost-utility analysis of the Individual Nutrition Therapy and Exercise Regime: A Controlled Trial of Injured, Vulnerable Elderly (INTERACTIVE) trial.
Design: Cost-utility analysis of a randomized controlled trial.
Subjects: A total of 175 patients following a hip fracture were allocated to receive either alternate weekly visits from a physical therapist and dietitian (intervention group), or social visits for 6 months (control group).
Methods: Costs for utilization of hospitals, health and community services were compared with quality-adjusted life years gained, calculated from responses to the Assessment of Quality of Life instrument.
Results: There were minimal differences in mean costs between the intervention ($AUD 45,331 standard deviation (SD): $AUD 23,012) and the control group ($AUD 44,764 SD: $AUD 20,712, p = 0.868), but a slightly higher mean gain in quality-adjusted life years in the intervention group (0.155, SD: 0.132) compared with the control group (0.139, SD: 0.149, p = 0.470). The incremental cost-effectiveness ratio was $AUD 28,350 per quality-adjusted life year gained, which is below the implied cost-effectiveness threshold utilized by regulatory authorities in Australia.
Conclusion: A comprehensive 6-month programme of therapy from dietitians and physical therapists could be provided at a relatively low additional cost in this group of frail older adults, and the incremental cost-effectiveness ratio indicates likely cost-effectiveness, although there was a very high level of uncertainty in the findings.
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