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Association between isotretinoin and ulcerative colitis in case control studies
| Ref. | Population | UC [RR (95%CI)] |
| Bernstein et al[2] | Residents of Manitoba Canada | 1.16 (0.56-2.20) |
| Crockett et al[8] | US health claims database | 4.36 (1.97-9.66) |
| Etminan et al[7] | Women using oral contraceptives | 1.10 (0.44-2.70) |
| Alhusayen et al[1] | British Columbia residents | 1.31 (0.96-1.80) |
UC: Ulcerative colitis.
