Survival after inflammatory bowel disease-associated colorectal cancer in the Colon Cancer Family Registry

Table 2 Adjusted hazard ratios and 95%CI for death, either with complete available time-at-risk or with follow-up ended 5 years after colorectal cancer diagnosis

	n	Deaths	aHR1 (95%CI)	n	Deaths	aHR2 (95%CI)	n	Deaths	aHR13 (95%CI)
Complete follow-up
No IBD	6952	2013	Ref.	6567	1926	Ref.	3836	1322	Ref.
IBD	250	74	1.08 (0.85-1.36)	242	71	1.09 (0.85-1.40)	81	26	1.20 (0.81-1.79)
P value			0.54			0.48			0.36
5-yr follow-up
No IBD	6903	1372	Ref.	6526	1320	Ref.	3801	871	Ref.
IBD	249	63	1.36 (1.05-1.76)	241	60	1.34 (1.02-1.77)	81	24	1.52 (1.00-2.30)
P value			0.018			0.037			0.048

¹Adjusted for age, recruitment phase, sex, and endoscopy;

²Additional adjustment for surveillance epidemiology and end results summary stage (local, regional, distant);

³Inflammatory bowel disease (IBD) confirmed from medical and pathology records at Seattle and Ontario centers only, non-IBD associated cases restricted to these centers. aHR: Adjusted hazard ratio.