Table 3.

Items to test during sensitivity analysis

	Ranges and thresholds
Days on ECMO	Highest & lowest observations
Length of stay in Critical Care Unit (ICU & HDU)	Highest & lowest calculated costs
Total length of stay in hospital	Highest & lowest calculated costs
Cost per day on organ support	Highest & lowest calculated costs
Distance from ECMO centre (cost of transport)	Replacing air with road transport
Change in difference in survival	Upper & lower CI of the attributable benefit
Other items with significant cost difference	Highest & lowest observations
Assumption of linear increasing utility for survivors over first 6 months	Assume constant utility at 6 month reported rate