Table 4.

Avoided costs, invested costs, net saving, and return on investment measured in sensitivity analyses

Economics parameters	Original ROI analysis	Sensitivity analysis 1 (Costs 2.5 × less)	Sensitivity analysis 2 (Probability divided by 2)	Sensitivity analysis 3 (Costs 1.5 × less and probability set at 0.05)
Avoided cost	€ 304,170	€ 121,621	€ 152,026	€ 112,452
Invested costs	€ 112,408	€ 112,408	€ 112,408	€ 112,408
Net saving (0.9 FTE)	€ 191,762	€ 9,213	€ 39,619	€ 44
Net saving (1.0 FTE)	€ 213,069	€ 10,237	€ 4,4021	€ 49
ROI	1.71 (171%)	0.08 (8%)	0.35 (35%)	0.004 (0.4%)
ROI (ratio)	1: 1.71	1: 0.08	1: 0.35	1: 0.004

FTE full-time equivalent, DRP drug-related problem, ROI return on investment, € Euros