. 2015 Jan 30;112(5):61–68. doi: 10.3238/arztebl.2015.0061

eTable 1. Original questions about willingness to be screened. decisional confidence. and knowledge about screening. and distribution of answers.

Question	Possible answers		Answers (%)
Willingness to be screened
If you were invited to undergo mammography screening today. would you do so? (n = 353)	no yes		15.0 85.0
Decisional confidence
How sure are you about this decision? (n=353)	not sure at all	1	3.1
		2	1.4
		3	4.0
		4	6.5
		5	20.7
	absolutely sure	6	64.3
Knowledge
Imagine a group of 100 women undergoing mammography screening. About how many of these women will have a positive finding (in other words. a finding that might indicate cancer) and will therefore need further diagnostic testing? (n=346)	^*1about 1 in 100		15.6
	^*2about 10 in 100		47.7
	about 20 in 100		31.8
	about 50 in 100		4.9
Suppose 10 women are told they have a positive finding and then undergo further testing to see whether they really have breast cancer. About how many will receive a diagnosis of breast cancer? (n=348)	^*1 1 in 10		41.4
	^*2 3 in 10		49.1
	7 in 10		7.2
	all 10		2.3
Imagine a group of 1000 women who are all 50 years old. About how many of them will have breast cancer in the next 10 years? (n=340)	^*220 in 1000		33.8
	^*150 in 1000		37.4
	100 in 1000		24.4
	300 in 1000		4.4
Now imagine a group of 1000 women who undergo mammography screening every two years for 10 years. How many of these women would otherwise have died of breast cancer. but will have their lives saved because they underwent mammography screening? (n=345)	^*2about 2 in 1000		14.5
	^*1about 15 in 1000		45.2
	about 100 in 1000		23.5
	about 200 in 1000		16.8
Out of 1000 women who undergo mammography screening every two years between the ages of 50 and 60. 24 will receive a diagnosis of breast cancer at some time in this period. Some will receive the diagnosis from the screening itself. and others will receive it between two screening tests. About how many of these 24 women will receive the diagnosis of breast cancer between two screening tests? The possible answers are given at right. with a diagram for each. Pick the answer that you think is correct. (n = 345)	●●●●●● ●●● ●●● ●●●●●● ●●●●●○675; ^*11 in 24		18.8
	●●●●●● ●● ●●●○675; ●●●●●○675; ●●●●●○675; ^*23 in 24		42.3
	●●●●●○675; ●●●●●○675; ●●●●○675; ○675; ●●●●○675; ○675; 6 in 24		25.5
	●●●●○675; ○675; ●●●●○675; ○675; ●●●●○675; ○675; ●●●○675; ○675; ○675; 9 in 24		13.3

^*1one point for this answer;

^*2two points for this answer; knowledge score from 0 to 10 (higher score = more knowledge)