Osteoarthritis

Cost‐Effectiveness of Weight‐Loss Interventions Prior to Total Knee Replacement for Patients With Class III Obesity

Arthritis Care Res (Hoboken)Published Cost-effectiveness analysis

Authors' conclusion

For patients with class III obesity considering TKR, RYGB provides good value while immediate TKR without weight loss is not economically efficient.

Study context

Population
Knee OA patients with class III obesity (BMI >40 kg/m²) considering total knee replacement (TKR)model-based
Comparison
RYGB vs laparoscopic sleeve gastrectomy (LSG) vs lifestyle nonsurgical weight loss vs immediate TKR vs no weight loss/no TKR
Outcome
Cost, quality-adjusted life expectancy (QALE) and incremental cost-effectiveness ratios (ICERs), discounted at 3% per year
Follow-up
Lifetime
Methodological detailsOsteoarthritis Policy model, health care sector perspective, discounted at 3% per year, deterministic and probabilistic sensitivity analyses
  • Osteoarthritis Policy model
  • Health care sector perspective
  • Discounted at 3% per year
  • Deterministic and probabilistic sensitivity analyses

Main finding

As reported in the abstract

Cost-effectiveness

ICER

$10,600/QALY

LSG vs No weight loss/no TKR · quality-adjusted life expectancy (QALE) +1.64 quality-adjusted life-years (QALYs); lifetime medical costs +$17,347

ICER

$20,500/QALY

RYGB vs LSG · QALE +0.22; costs +$4,607

Further findings

TKR utilization

Relative to immediate TKR, LSG and RYGB delayed and decreased TKR utilization

Probabilistic sensitivity analysis

RYGB cost-effective in iterations at willingness-to-pay $50,000/QALY
67%

Original publication

Cost‐Effectiveness of Weight‐Loss Interventions Prior to Total Knee Replacement for Patients With Class III Obesity. Arthritis Care Res (Hoboken). Published 1 February 2023. doi:10.1002/acr.25044

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