elicitation format
0 = open-ended
1 = payment

would you have screening test?
1 = yes
2 = no
3 = don't know

preference groups
1 = FOB
2 = Flexi-scope
3 = No preference

dummy variable for preference group_FOB
0 = otherwise
1 = prefer FOB

dummy variable for preference group_FS
0 = otherwise
1 = prefer FS

WTP direction
0 = WTP FOB = WTP FS
1 = WTP FOB > WTP FS
2 = WTP FOB < WTP FS

WTP zero for FOB
0 = otherwise
1 = zero WTP value for FOB

WTP zero for FS
0 = otherwise
1 = zero WTP for FS

response to FOB WTP question
0 = response
1 = non response

response to FS WTP question
0 = otherwise
1 = non-response

response to both WTP questions
0 = response to both questions
1 = non-response to both questions
2 = respond to one question

0 = female
1 = male

annual household income
1 = Less than £10,000
2 = £10,000 - £20,000
3 = £20,001 - £30,000
4 = More than £30,000

dummy variable for income less than £10k
0 = otherwise
1 = less than £10k

dummy variable for income £10-20k
0 = otherwise
1 = £10-20k

dummy variable for income £20-30k
0 = otherwise
1 = 20-30k

dummy variable for income >£30k
0 = otherwise
1 = more than 30k

smoking status
1 = smoker
2 = ex-smoker
3 = never smoked

dummy variable for smoking status
0 = otherwise
1 = smoker

number of dental visits_2 years
1 = none
2 = once
3 = twice
4 = three times
5 = four times
6 = more than four times

importance of exercising regularly
1 = not at all
2 = somewhat
3 = moderately
4 = very
5 = extremley

worried about getting bowel cancer
1 = not worried
2 = a bit worried
3 = quite worried
4 = very worried

dummy variable for worried
0 = worried
1 = no worries expressed

compared with other men and women of same age, what are chances?
1 = much lower
2 = little lower
3 = about the same
4 = a little higher
5 = much higher

dummy variable for chances
0 = other
1 = above average

had FOB?
0 = no
1 = yes

no reasons offered
0 = otherwise
1 = no reason offered

inapplicable, irrelevant to circumstances eg. age.
0 = otherwise
1 = mention