Reducing the socioeconomic gradient in uptake of the NHS bowel cancer screening Programme using a simplified supplementary information leaflet: a cluster-randomised trial

Table 5 Proportion of individuals who were adequately screened^a, according to socioeconomic status quintile^b and screening round

	Prevalent first time invitees*		Prevalent previous non-responders*		Incident episodes*
	SI + Gist N = 13,034	SI N = 12,410	SI + Gist N = 26,368	SI N = 24,551	SI + Gist N = 45,019	SI N = 42,143
	% (n)	% (n)	% (n)	% (n)	% (n)	% (n)
Adequately screened:	49.6 (6466)	48.2 (5981)	14.5 (3836)	14.2 (3479)	85.2 (38351)	85.0 (35830)
1st quintile (least deprived)	58.3 (1708)	56.1 (1541)	16.9 (792)	17.8 (796)	87.9 (10047)	86.9 (9841)
2nd quintile	55.6 (1610)	53.4 (1473)	16.2 (898)	15.9 (790)	86.3 (9797)	86.6 (9149)
3rd quintile	49.7 (1352)	49.4 (1270)	15.5 (874)	15.3 (741)	85.4 (8506)	85.4 (7324)
4th quintile	43.7 (995)	42.3 (943)	13.0 (683)	12.7 (596)	83.1 (5985)	83.4 (5448)
5th quintile (most deprived)	36.0 (786)	35.9 (746)	11.2 (580)	10.0 (549)	79.2 (3956)	79.1 (4021)

^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)
^b271 (138 intervention and 133 control) individuals missing socioeconomic status
*Comparison between trials groups within each screening round: Prevalent first time invitees (OR = 1.06, 95% CI: 0.96–1.16, p = 0.23); Prevalent previous non-responders (OR = 1.03, 95% CI: 0.94–1.13, p = 0.50); Incident episodes (OR = 1.01, 95% CI: 0.95–1.08, p = 0.67)
*Comparison between trials groups within each screening round adjusting for age, gender and hub: Prevalent first time invitees (OR = 1.04, 95% CI: 0.98–1.10, p = 0.17); Prevalent previous non-responders (OR = 1.03, 95% CI: 0.96–1.09, p = 0.44); Incident episodes (OR = 1.01, 95% CI: 0.96–1.07, p = 0.73)

ISSN: 1471-2407