Retrospective Cohort Study
Copyright ©The Author(s) 2022.
World J Clin Cases. Feb 26, 2022; 10(6): 1787-1794
Published online Feb 26, 2022. doi: 10.12998/wjcc.v10.i6.1787
Table 1 Baseline demographics and inflammatory bowel disease characteristics stratified by inflammatory bowel disease diagnosis
Crohn's disease
Ulcerative colitis
Indeterminate IBD
n = 4
n = 14
n = 1
Demographics
Age at first ICI use, yr, median, IQR63, 469, 12.560, 0
Female sex, n (%)2 (50.0)2 (14.3)0 (0)
White race, n (%)3 (75.0)11 (78.6)1 (100)
Black race, n (%)1 (25.0)1 (7.1)0 (0)
Asian race, n (%)0 (0)1 (7.1)0 (0)
Other race, n (%)0 (0)1 (7.1)0 (0)
Non-Hispanic ethnicity, n (%)4 (100)12 (85.7)1 (100)
Hispanic/Latino ethnicity, n (%)0 (0)2 (14.3)0 (0)
Never smoker, n (%)2 (50.0)5 (35.7)0 (0)
Former smoker, n (%)2 (50.0)9 (64.3)1 (100)
Body mass index, median, IQR21.6, 1.725.5, 6.124.1, 0
IBD characteristics
Age at IBD onset, yr, median, IQR156, 039.5, 32.854, 0
IBD duration, yr, median, IQR17, 120, 29.256, 0
Disease location, n (%)L1: 1 (25.0)E1: 1 (7.1)-
L2: 1 (25.0)E2: 4 (28.6)-
L3: 2 (50.0)E3: 7 (50.0)-
-Unknown: 2 (14.3)-
Disease behavior, n (%)B1: 2 (50.0)--
B2: 1 (25.0)--
B3: 0 (0)--
Unknown: 1 (25.0)--
Perianal disease, n (%)0 (0)--
Extra-intestinal manifestations, n (%)0 (0)0 (0)0 (0)
Table 2 All baseline clinical characteristics stratified by prevalence of inflammatory bowel disease exacerbation

Exacerbation
No exacerbation
P value1
n = 7
n = 12
Demographics
Female sex, n (%)0 (0)4 (33.3)0.2451
Age at first ICI use, yr, median, IQR60, 12.566, 9.30.6055
White race, n (%)4 (57.1)11 (91.7)0.1174
Black race, n (%)1 (14.3)1 (8.3)1.0000
Asian race, n (%)1 (14.3)0 (0)0.3684
Other race, n (%)1 (14.3)0 (0)0.3684
Non-Hispanic ethnicity, n (%)5 (71.4)12 (100)0.1228
Hispanic/Latino ethnicity, n (%)2 (28.6)0 (0)0.1228
Former smoker, n (%)3 (42.9)9 (75.0)0.3261
Body mass index, median, IQR24.3, 1.825.2 (6.7)0.9018
Co-morbidities
Hypertension, n (%)1 (14.3)6 (50.0)0.1733
Hyperlipidemia, n (%)3 (42.9)6 (50.0)1.0000
Heart failure, n (%)0 (0)3 (25.0)0.2632
Coronary artery disease, n (%)0 (0)2 (16.7)0.5088
Chronic kidney disease, n (%)0 (0)2 (16.7)0.5088
Diabetes mellitus, n (%)2 (28.6)1 (8.3)0.5232
Gastroesophageal reflux disease, n (%)1 (14.3)1 (8.3)1.0000
Asthma, n (%)0 (0)2 (16.7)0.5088
Chronic obstructive pulmonary disease, n (%)1 (14.3)1 (8.3)1.0000
IBD characteristics
Crohn's disease, n (%)0 (0)4 (33.3)0.2451
Ulcerative colitis, n (%)6 (85.7)8 (66.7)0.6027
Indeterminate IBD, n (%)1 (14.3)0 (0)0.3684
Age at IBD onset, yr, median, IQR247, 28.356, 24.50.9668
IBD duration, yr, median, IQR211.5, 19.7520, 240.9184
History of GI surgery before ICI use, n (%)2 (28.6)5 (41.7)0.6562
Latest known disease state before ICI use, n (%)Active: 0 (0)Active: 0 (0)1.0000
Inactive: 5 (71.4)Inactive: 10 (83.3)0.6027
Unknown: 2 (28.6)Unknown: 2 (16.7)0.6027
Latest available 25 (OH) D before ICI use, ng/mL, median, IQR338.9, 11.229.0, 9.50.8857
GI medications at start of ICI use, n (%)
Aminosalicylate3 (42.9)3 (25.0)0.6169
Glucocorticoid1 (14.3)2 (16.7)1.0000
Cholecalciferol (vitamin D3)3 (42.9)3 (25.0)0.6169
Laxative (PEG, senna glycoside, docusate)3 (42.9)3 (25.0)0.6169
Anti-diarrheal (diphenoxylate-atropine, loperamide)1 (14.3)3 (25.0)1.0000
TNF inhibitor0 (0)1 (8.3)1.0000
Mercaptopurine1 (14.3)0 (0)0.3684
Other medications at start of ICI use, n (%)
Oral antibiotics0 (0)2 (16.7)0.5088
Proton pump inhibitor3 (42.9)2 (16.7)0.3047
Famotidine0 (0)2 (16.7)0.5088
Metformin1 (14.3)0 (0)0.3684
Insulin secretagogue0 (0)1 (8.3)1.0000
Insulin1 (14.3)1 (8.3)1.0000
Benzodiazepine2 (28.6)4 (33.3)1.0000
Selective serotonin reuptake inhibitors1 (14.3)2 (16.7)1.0000
Diuretic0 (0)4 (33.3)0.2451
ACE inhibitor or angiotensin receptor blocker3 (42.9)5 (41.7)1.0000
HMA-CoA reductase inhibitor4 (57.1)6 (50.0)1.0000
Anticoagulant or antiplatelet1 (14.3)4 (33.3)0.6027
Nonsteroidal anti-inflammatory drug3 (42.9)3 (25.0)0.6169
Donezepil1 (14.3)1 (8.3)1.0000
Glucosamine1 (14.3)1 (8.3)1.0000
Ondansetron2 (28.6)3 (25.0)1.0000
Chemotherapeutic kinase inhibitor1 (14.3)0 (0)0.3684
Cancer characteristics and management
Primary cancer origin, n (%)
Bladder0 (0)5 (41.7)0.1060
Melanoma3 (42.9)2 (16.7)0.3047
Lung2 (28.6)4 (33.3)1.0000
GI1 (14.3)1 (8.3)1.0000
Other1 (14.3)3 (25.0)1.0000
Radiation therapy for cancer, n (%)5 (71.4)9 (75.0)1.0000
Checkpoint inhibitor, n (%)
Ipilimumab2 (28.6)1 (8.3)0.5232
Nivolumab2 (28.6)2 (16.7)0.6027
Pembrolizumab4 (57.1)8 (66.7)1.0000
Atezolizumab0 (0)1 (8.3)1.0000
Avelumab0 (0)0 (0)1.0000
Durvalumab0 (0)1 (8.3)1.0000
Cemiplimab0 (0)0 (0)1.0000
Any anti-PD-1 or -PD-L16 (85.7)12 (100)0.3684
Combination anti-CTLA-4 and -PD-1/PD-L11 (14.3)1 (8.3)1.0000
Table 3 Inflammatory bowel disease management and clinical outcomes following immune checkpoint inhibitor treatment stratified by prevalence of inflammatory bowel disease exacerbation

Exacerbation
No exacerbation
P value1
n = 7
n = 12
Follow up time, d, median, IQR435, 306572, 4500.4824
Length of ICI use, mo, median, IQR12, 106.5, 9.30.3685
Reason for ICI discontinuation, n (%)
Cancer remission1 (14.3)1 (8.3)1.0000
Cancer non-response0 (0)2 (16.7)0.5088
Side effect(s)1 (14.3)3 (25.0)1.0000
Patient preference0 (0)1 (8.3)1.0000
Deceased1 (14.3)2 (16.7)1.0000
Unknown0 (0)1 (8.3)1.0000
Not discontinued4 (57.1)2 (16.7)0.1287
GI-related hospitalization, n (%)4 (57.1)0 (0)0.0090
GI-related surgery, n (%)2 (28.6)0 (0)0.1228
IBD medications used after ICI initiation, n (%)
Aminosalicylates4 (57.1)4 (33.3)0.3765
Glucocorticoids3 (42.9)4 (33.3)1.0000
TNF inhibitor2 (28.6)1 (8.3)0.5232
Mercaptopurine1 (14.3)0 (0)0.3684
None2 (28.6)5 (41.7)0.6562
Deceased, n (%)1 (14.3)4 (33.3)0.6027