Table 1.

Demographic characteristics of trial participants, by intervention arm

Characteristic	Intervention		Control
	n	%	n	%
Total	393	100	391	100
Age, years
50–54	127	32.3	135	34.5
55–59	155	39.4	131	33.5
60–64	111	28.2	125	32.0
Ethnic background
White	229	58.3	218	55.8
Black	69	17.6	67	17.1
Asian	56	14.2	67	17.1
Mixed/other/unknown	39	9.9	39	10.0
Time since their last screening test
Late (6–<10 years)	272	69.2	264	67.5
Very late (10–15 years)	121	30.8	127	32.5
GP practice
1	16	4.1	15	3.8
2	15	3.8	16	4.1
3	58	14.8	54	13.8
4	50	12.7	49	12.5
5	50	12.7	47	12.0
6	36	9.2	39	10.0
7	8	2.0	13	3.3
8	50	12.7	51	13.0
9	87	22.1	85	21.7
10	23	5.9	22	5.6