Table 2.

Sensitivity Analysis for Prosthesis Maintenance Needs

		Expected Prosthesis Need	Lower Prosthesis Need
Varied values
	Frequency of Purchase (Years)	2.3	5
	Cost of Annual Maintenance	20%	10%
Excess cost of amputation with 2% discount rate
	18-year-old patient	$279,586	$166,413
	40-year-old patient	$216,761	$129,124
	63-year-old patient	$123,405	$73,714

Lower ongoing prosthesis need (i.e., reduced frequency of purchase from every 2.3 years to every 5 years and reduced annual maintenance cost from 20% to 10% of the cost of the prosthesis) reduces the cost difference between reconstruction and amputation, especially for younger patients.