Table IV.

Risk estimates of a consequent colectomy.

		95% CI
Characteristic	Risk estimate	Lower	Upper
Male gender	0.944	0.334	2.670
Age ≥40 years	0.762	0.250	2.319
Disease duration ≥4 years	0.514	0.177	1.491
Seo’s CIDAI ≥220 points	1.083	0.386	3.044
Prior AZA treatment	2.105	0.648	6.835
Undermining ulcer present	0.711	0.255	1.981
Pancolitis	2.403	0.788	7.335
C7-HRP positivity	3.529	1.051	11.855
PSL ≥10,000 mg	3.972	1.091	14.467
CNI non-responder	19.833	3.950	99.590

Values in bold print are statistically significant. AZA, azathioprine; CIDAI, complex integrated disease activity index; CI, confidence interval; CNI, calcineurin inhibitor; PSL, prednisolone.