Research Article
Prospective Study of BK Virus Infection in Patients with Inflammatory Bowel Disease
Table 1
Severity of the inflammatory bowel disease of the 53 patients included in the study according to the Harvey Bradshaw index and the Montreal classification.
(a) Patients with Crohn’s disease | ||||||||||||||||||||||||||||||||||||||||
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(b) Patients with ulcerative colitis | ||||||||||||||||||||||||||||||||||||||||
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A1: below 16 y; A2: 17–40 y; A3: above 40 y. L1: ileal; L2: colonic; L3: ileocolonic; L4: isolated upper disease. B1: nonstricturing, nonpenetrating; B2: stricturing; B3: penetrating. E1: ulcerative proctitis. Involvement limited to the rectum. E2: left-sided ulcerative colitis. Involvement limited to a proportion of the colorectum distal to the splenic flexure. E3: extensive pancolitis. Involvement extends proximally to the splenic flexure. S1: mild colitis; S2: moderate colitis; S3: severe colitis. |