A positive faecal immunochemical test result and its association with the incidence of rheumatoid arthritis, systemic lupus erythematosus, and psoriatic arthritis: an analysis of one-million national colorectal cancer screening programme results

Table 3 Incidence rates of immune-mediated inflammatory disease between the faecal immunochemical test (−) and faecal immunochemical test (+) groups

Groups	Total number (%)			IR (95% CI)			Adjusted IR (95% CI)^a
Groups	RA	SLE	PsA	RA	SLE	PsA	RA	SLE	PsA
Overall	7645 (0.73)	208 (0.02)	101 (0.01)	9.56 (9.35, 9.78)	0.26 (0.23, 0.30)	0.13 (0.10, 0.15)	-	-	-
FIT (−) group (Ref.)	5734 (0.70)	157 (0.02)	79 (0.01)	9.28 (9.04, 9.52)	0.25 (0.22, 0.30)	0.13 (0.10, 0.16)	8.96 (8.21, 9.78)	0.23 (0.19, 0.28)	0.14 (0.06, 0.34)
FIT (+) group	1911 (0.83)	51 (0.02)	22 (0.01)	10.52 (10.06, 11.00)	0.28 (0.21, 0.37)	0.12 (0.08, 0.18)	10.11 (9.26, 11.03)	0.20 (0.17, 0.25)	0.09 (0.04, 0.21)
p value				0.929	0.944	0.969	0.057	0.374	0.493

FIT faecal immunochemical test, IR incidence rate per 10,000 person-years, CI confidence interval, RA rheumatoid arthritis, SLE systemic lupus erythematosus, PsA psoriatic arthritis
^aAge and sex adjusted

ISSN: 1741-7015