Impact of comorbid conditions on participation in an organised colorectal cancer screening programme: a cross-sectional study

Table 2 Multivariate multinomial regression analysis for participation in the colorectal cancer screening programme by clinical risk groups

	Unadjusted (n = 36,208)				Adjusted^b (n = 33,943)
	IRR	IC95%		p	IRR	IC95%		p
CRG status
Healthy^a	1	-	-	-	1	-	-	-
Acute disease	1.03	0.70	1.52	0.879	0.73	0.49	1.11	0.142
Minor chronic disease	1.25	1.18	1.32	<0.001	1.05	0.99	1.12	0.119
Multiple minor chronic diseases	1.49	1.40	1.58	<0.001	1.14	1.06	1.22	<0.001
Single dominant chronic idisease	1.25	1.19	1.31	<0.001	0.98	0.93	1.04	0.509
Two dominant chronic disease	1.29	1.24	1.35	<0.001	0.95	0.90	1.01	0.087
Three or more dominant chronic disease	1.02	0.88	1.19	0.782	0.76	0.65	0.89	0.001
Malignancies	1.17	1.01	1.35	0.039	0.87	0.74	1.01	0.067
Catastrophic condition	1.11	0.91	1.36	0.286	0.90	0.74	1.10	0.310
Collapsed CRG
Healthy or acute disease^a	1	-	-	-	1	-	-	-
Minor chronic diseases	1.34	1.28	1.41	<0.001	1.09	1.03	1.15	0.002
Dominant chronic diseases	1.27	1.22	1.32	<0.001	0.97	0.92	1.02	0.186
Malignancies or catastrophic condition	1.15	1.02	1.30	0.025	0.88	0.78	1.00	0.055

Statistically significant differences are showed in bold (p < 0.05).
FIT Faecal immunochemical test, IRR Incidence Rate Ratio, CRG Clinical Risk Group
^aReference category
^bAdjusted by sex, age, socioeconomic deprivation index, number of visits, study group of the Colo-alert cluster randomised controlled trial

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