Table 5. Willingness to trade mortality risk to achieve an improvement in one of the prostate screening attributes.

Attribute	Willingness to trade mortality risk (% CI)	To receive a screening programme
Unnecessary treatment	2.0 (1.6 to 2.4)	With 10% less risk of unnecessary treatments
Screening interval	0.5 (−1.3 to 2.4)	Every year instead of every 4 years
	4.6 (2.8 to 6.4)	Every 2 years instead of every 4 years
	−0.7 (−2.8 to 1.4)	Every 3 years instead of every 4 years
Unnecessary biopsy	1.8 (1.3 to 2.3)	With 10% less risk of unnecessary biopsies
Out-of-pocket costs	5.5 (3.9 to 7.1)	With €100 lower out-of-pocket costs

Abbreviations: CI=confidence interval; WTP=willingness to pay.

CI=95% confidence interval based on the Krinsky Robb method adjusted for class probabilities

The average values of the interactions are taken into account (i.e., costs=€112.50; mortality reduction=27.5% unnecessary treatment=37.5% unnecessary biopsy=50%).