x: An object of class cea_pw returned by cea_pw().
k: Willingness to pay.
cri: If TRUE, credible intervals are computed; otherwise they are not.
prob: A numeric scalar in the interval (0,1) giving the credible interval. Default is 0.95 for a 95 percent credible interval.
digits_qalys: Number of digits to use to report QALYs.
digits_costs: Number of digits to use to report costs.
output: Should output be a data.table or a list of matrices for each group.
rownames: Row names for matrices when output = "matrix".
colnames: Column names for matrices when output = "matrix".
drop: If TRUE, then the result is coerced to the lowest possible dimension. Relevant if output = "matrix" and there is one group, in which case a single matrix will be returned if drop = TRUE and a list of length 1 will be returned if drop = FALSE.
Returns
If output = "matrix", then a list of matrices (or a matrix if drop = TRUE) reporting incremental cost-effectiveness ratios (ICERs) by group. Specifically, each matrix contains five rows for: (i) incremental quality-adjusted life-years (QALYs), (ii) incremental costs, (iii) the incremental net monetary benefit (NMB), (iv) the ICER, and (v) a conclusion stating whether each strategy is cost-effective relative to a comparator. The number of columns is equal to the number of strategies (including the comparator).
If output = "data.table", then the results are reported as a data.table, with one row for each strategy and group combination.