Efficacy and Cost-Benefit Analysis of Magnetic Resonance Imaging in the Follow-Up of Soft Tissue Sarcomas of the Extremities and Trunk

Table 6

Numbers needed to screen and costs per local recurrence.

Years	Previous conspicuous finding	Number needed to screen	Costs of recurrence detection (€)
0–2	No	30.19	6038.00
	Yes	5.18	1036.00
3–5	No	35.85	7170.00
	Yes	13.00	2600.00
5–10	No	45.29	9058.00
	Yes	5.60	1120.00

Known R1 or R2 resection, and MRI examinations with a conspicuous finding directly preceding the respective examination.