Constructs the cost-increasing (upward) portion of the cost-effectiveness frontier
by iteratively selecting solutions with the lowest ICERs among options that cost
more and provide better impact than the current solution.
Usage
build_frontier_up(x, start_pos, threshold, up_filter)
Arguments
- x
A data.frame containing ordered cost and impact data
- start_pos
Integer. Position of the starting solution in the ordered data
- threshold
Numeric. Willingness-to-pay threshold for ICER acceptability
- up_filter
Function. Optional user-defined filter for cost-increasing candidates
Value
A data.frame containing cost-increasing frontier solutions with step numbers
(positive values indicating cost-increasing steps)