Adherence to Medical Treatment in Inflammatory Bowel Disease Patients from a Referral Center in Bahia-Brazil

Table 2

Montreal classification in Crohn’s disease patients from Salvador/BA 2017/2018.

Age at diagnosis
A1: ≤16 years	5 (4.3)
A2: 17-40 years	82 (70.7)
A3: >40 years	29 (25.0)
Location
L1: terminal ileum	21 (18.4)
L2: colon	49 (43.0)
L3: ileocolonic	44 (38.6)
L1+upper GI tract (L4)^a	5 (4.4)
L2+L4	4 (3.5)
L3+L4	6 (5.3)
Behavior
B1: nonstricturing/nonpenetrating	59 (53.2)
B2: stricturing	25 (22.5)
B3: penetrating	27 (24.3)
B1+perianal disease (p)^b	24 (21.6)
B2+(p)	6 (5.4)
B3+(p)	14 (12.6)

Values are presented as number (%). ^aUpper gastrointestinal tract modifier (L4) allows location coclassification L4 through L1 to L3. ^b(p) modifier perianal disease, added to B1 to B3, if concomitant perianal disease.