Table 1. Percentages, unadjusted and adjusted odds ratios (OR) for being reported to have been offered a coupon (N = 2402) and for being recruited if reported to have been offered a coupon (N = 656).

Variables	Category	Reported to have been offered a coupon (among whole target population) N = 2402			Recruited (among men reported to have been offered a coupon) N = 656
		% (n/N)	Unadjusted OR (95% CI) (p-value)	Adjusted* OR (95% CI) (p-value)	% (n/N)	Unadjusted OR (95% CI) (p-value)	Adjusted* OR (95% CI) (p-value)
Age	50+	33% (236/714)	1	1	80% (189/236)	1	1
	40–49	32% (160/496)	0.96 (0.76–1.23)	1.00 (0.77–1.29)	77% (123/160)	0.83 (0.51–1.35)	0.88 (0.54–1.46)
	30–39	26% (170/660)	0.70 (0.56–0.89)	0.71 (0.56–0.91)	76% (129/170)	0.78 (0.49–1.26)	0.77 (0.47–1.25)
	20–29	18% (89/485)	0.46 (0.34–0.60)	0.42 (0.31–0.56)	71% (63/89)	0.60 (0.35–1.05)	0.61 (0.34–1.10)
	<20	2% (1/47)	0.04 (0.01–0.32)	0.04 (0.01–0.33)	100% (1/1)	-
			(p<0.0001)	(p<0.0001)		(p = 0.4)	(p = 0.4)
Socioeconomic status	Highest	22% (134/617)	1	1	69% (93/134)	1	1
	Higher	28% (170/597)	1.44 (1.11–1.86)	1.40 (1.07–1.84)	76% (130/170)	1.43 (0.86–2.39)	1.64 (1.27–2.13)
	Lower	35% (190/550)	1.90 (1.47–2.47)	1.83 (1.39–2.39)	78% (149/190)	1.60 (0.97–2.65)	2.32 (1.78–3.02)
	Lowest	27% (139/514)	1.34 (1.02–1.76)	1.17 (0.88–1.56)	85% (118/139)	2.48 (1.37–4.48)	2.27 (1.73–2.96)
	Unknown	19% (23/124)	0.82 (0.5–1.34)	0.97 (0.58–1.61)	65% (15/23)	0.83 (0.33–2.10)	1.34 (0.85–2.12)
			(p<0.0001)	(p = 0.0001)		(p = 0.02)	(p = 0.06)
Participated in last cohort round	No	17% (190/1114)	1	1	65% (123/190)	1	1
	Yes	36% (466/1288)	2.76 (2.27–3.34)	2.84 (2.33–3.46)	82% (382/466)	2.48 (1.69–3.62)	4.30 (3.57–5.19)
			(p<0.0001)	(p<0.0001)		(p<0.0001)	(p<0.0001)

P-values are overall p-values for the association. *  =  Adjusted for other variables in the table. The order of the age categories has been reversed so that 50+ year olds are the reference category due to the small number of <20 year old men who were reported to have been offered a coupon