Observational Study
Copyright ©The Author(s) 2021.
World J Clin Cases. Dec 26, 2021; 9(36): 11285-11299
Published online Dec 26, 2021. doi: 10.12998/wjcc.v9.i36.11285
Table 1 Variables collected at baseline and during follow-up visits
Variable
Baseline
Follow-up
Demographic data
Date of birthX-
GenderX-
Smoking habitX-
Disease data
Date of diagnosisX-
IBD type (Crohn’s disease, ulcerative colitis)X-
Montreal classification X-
Type of fistula (perianal, entero-enteral, enterovesical, enterovaginal, enterocutaneous, other)X-
Intra-intestinal complications (yes or no)X-
Extraintestinal complications (dermatological, osseous, optical, hepatic)X-
Harvey-Bradshaw indexXX
Crohn’s disease activity indexXX
Partial Mayo ScoreXX
Truelove-Witts severity indexXX
Laboratory analysis
C-reactive proteinXX
Erythrocyte sedimentation rateXX
HemoglobinXX
CalprotectinXX
CT-P13 trough levels and antibodiesx-X
Imaging tests
Disease severity and lesion location according to endoscopy result (mild, moderate, severe)XX
Disease severity and lesion location according to magnetic resonance enterography result (mild, moderate, severe, fibrotic stenosis)XX
Treatment data
Current treatments (mesalazine, cortisone, AZA/6-MP, MTX)XX
Previous treatments (mesalazine, corticosteroids, AZA/6-MP, MTX, infliximab, adalimumab)X-
Reasons to start treatment with CT-P13 (corticosteroid dependence, corticosteroid resistance, failure of AZA/6-MP, perianal disease/fistula, start of severe illness)X-
Clinical situation
Active clinical diseaseXX
Clinical remissionXX
Clinical response-X
Table 2 Clinical characteristics of study patients at baseline, n (%)

Overall (n = 220)
CD (n = 133)
UC (n = 87)
Endoscopic findings (presence and size of ulcers)
Unaffected9 (4)7 (5)2 (2)
Mild (1-5 mm)7 (3)1 (1)6 (7)
Moderate (5-20 mm)54 (25)21 (16)33 (38)
Severe (> 20 mm)41 (19)25 (19)16 (18)
Fibrotic stenosis7 (3)7 (5)0 (0)
Not performed102 (46)72 (54)30 (34)
Ultrasound findings (hyperemia of the bowel wall assessed by color Doppler ultrasound)
Unaffected5 (2)5 (4)-
Mild (2 signal dots/cm2)7 (3)7 (5)-
Moderate 34 (26)-
(3-5 signal dots/cm2)34 (15)
Severe (> 5 signal dots/cm2)22 (10)22 (17)-
Not performed152 (69)65 (49)87 (100)
Previous treatments
Mesalazine97 (44)37 (28)60 (69)
Corticosteroids131 (60)73(55)58 (67)
AZA/6-MP135 (61)82 (62)53 (61)
MTX12 (5)10 (8)2 (2)
Remicade®35 (16)21 (16)14 (16)
Humira®22 (10)15 (11)7 (8)
Concomitant treatments
Mesalazine77 (35)28 (21)49 (56)
Corticosteroids74 (35)37 (28)37 (43)
AZA/6-MP115 (52)67 (50)48 (55)
MTX15 (7)15 (11)0 (0)
Table 3 Montreal classification of Crohn’s disease and ulcerative colitis at baseline, n (%)
Montreal classification of CD
CD (n = 133)
Age of diagnosis
A1 (below 16 yr)15 (11)
A2 (between 17 and 40 yr)90 (68)
A3 (above 40 yr)18 (14)
- 10 (8)
Location
L1 (ileal)62 (47)
L2 (colonic)16 (12)
L3 (ileocolonic)47 (35)
- 8 (6)
Location L41 (concomitant UGI disease)
Yes4 (3)
No87 (65)
- 42 (32)
Behavior
B1 (non-stricturing, non-penetrating)60 (45)
B2 (stricturing)24 (18)
B3 (penetrating)38 (29)
- 11 (8)
P2 (concomitant perianal disease)
Yes38 (29)
No84 (63)
- 11 (8)
Montreal classification of UCUC (n = 87)
Extent
E1 (Ulcerative proctitis)10 (11)
E2 (Left-sided UC - distal UC)18 (21)
E3 (Extensive UC - pancolitis)48 (55)
- 11 (13)
Severity
S1 (Mild UC)8 (9)
S2 (Moderate UC)54 (62)
S3 (Severe UC)15 (17)
- 10 (11)
Table 4 Clinical course of all patients (Crohn’s disease + ulcerative colitis) (those who switched from infliximab originator are excluded), n (%)

Active disease
Clinical remission
Clinical response
Baseline (n = 201)138 (68.6)--
3 mo (n = 152)37 (24.4)81 (53.2)34 (22.3)
6 mo (n = 122)21 (17.2)74 (60.7)27 (22.1)
9 mo (n = 84)8 (9.5)61 (72.6)15 (17.9)
12 mo (n = 81)12 (14.8)52 (64.2)17 (21)
Table 5 Type of adverse events reported, n (%)
Number of AEs1
34 (15.45)
Hypersensitivity9 (26.5)
Malignant neoplasm1 (2.9)
Infections (any type)8 (23.5)
Respiratory infections2 (5.9)
Other infections6 (17.6)
Other AEs8 (23.5)
Non-specified8 (23.5)