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Retrospective Cohort Study
Copyright: ©Author(s) 2026.
World J Gastrointest Pharmacol Ther. Jun 5, 2026; 17(2): 113874
Published online Jun 5, 2026. doi: 10.4292/wjgpt.v17.i2.113874
Table 1 Demographic characteristics and bowel symptoms of index colonoscopies, comparing lymphocytic and collagenous subtypes, n (%)

Microscopic colitis
Lymphocytic colitis
Collagenous colitis
Total number22814583
Age at diagnosis (yr)60 (IQR: 48-72)60 (IQR: 47-71)60 (IQR: 50-74)
Male66 (29)47 (32)19 (23)
Female162 (71)98 (68)64 (77)
Bowel symptoms available196 (86)122 (84)74 (89)
Diarrhea (n = 196)192 (98)119 (98)73 (99)
Alternating motions (n = 196)3 (1.5)2 (1.6)1 (1.4)
No diarrhea (n = 196)1 (0.5)1 (0.8)0 (0)


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