# Table 3 Proportion of individuals who were adequately screeneda, according to socioeconomic status quintileb and median age at invite

Age at invite <65 years* Age at invite 65–69 years* Age at invite 70+ years*
SI + Gist
N = 35,920
SI
N = 33,589
SI + Gist
N = 30,707
SI
N = 28,379
SI + Gist
N = 17,794
SI
N = 17,136
% (n) % (n) % (n) % (n) % (n) % (n)
Adequately screened: 54.9 (19727) 54.2 (18200) 60.8 (18657) 61.1 (17346) 57.7 (10269) 56.9 (9744)
1st quintile (least deprived) 63.6 (5135) 62.9 (4883) 69.1 (4740) 69.0 (4655) 64.9 (2672) 65.3 (2640)
2nd quintile 59.4 (4924) 59.0 (4449) 64.8 (4751) 66.5 (4476) 63.1 (2630) 61.9 (2487)
3rd quintile 54.9 (4201) 55.3 (3762) 61.8 (4224) 61.7 (3488) 60.1 (2307) 59.0 (2085)
4th quintile 50.0 (3206) 48.7 (2880) 55.3 (2961) 56.7 (2706) 50.3 (1496) 50.3 (1401)
5th quintile (most deprived) 41.0 (2226) 39.9 (2199) 45.5 (1946) 45.1 (1996) 43.1 (1150) 41.1 (1121)
1. aReturned a gFOBt kit within 18 weeks of the invitation that led to a ‘definitive’ test result of either ‘normal’ (i.e. no further investigation required) or ‘abnormal’ (i.e. requiring referral for further testing, usually colonoscopy) by the date of data extraction (18 weeks after the last day of the intervention)
2. b271 (138 intervention and 133 control) individuals missing socioeconomic status
3. *Comparison between trials groups within age at invite group: <65 years (OR = 1.03, 95% CI: 0.94–1.13, p = 0.52); 65–69 years (OR = 0.98, 95% CI: 0.85–1.13, p = 0.83); 70+ years (OR = 1.04, 95% CI: 0.90–1.19, p = 0.64)
4. *Comparison between trials groups within age at invite group adjusting for gender, hub and screening round: <65 years (OR = 1.03, 95% CI: 0.99–1.07, p = 0.13); 65–69 years (OR = 1.00, 95% CI: 0.93–1.07, p = 0.93); 70+ years (OR = 1.06, 95% CI: 0.99–1.13, p = 0.08)