Table 1.

Parameter distributions

	Distribution	Mean	SD	Alpha	Beta
Probability of chemotherapy given LR Oncotype result	Beta	0.05	0.006	4	76.4
Probability of chemotherapy given HR test Prosigna result	Beta	0.95	0.003	13.1	0.7
RR reduction in the risk of DR post chemotherapy	Log normal	− 1.3471 (log costs)	0.3585 (log costs)	NA	NA

DR distant recurrence, HR high risk, LR low risk, NA not applicable, RR relative risk, SD standard deviation