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Multivariate analysis showing the dosage of steroid per month just before surgery
| Odds ratio | 95%CI | P | |
|---|---|---|---|
| Age at initial surgery (>32 years) | 3.60 | 0.66–25.55 | 0.14 |
| Type of disease (chronic continuous) | 4.69 | 0.63–44.83 | 0.13 |
| Extent of colitis (left-sided colitis) | 1.58 | 0.08–6.05 | 0.67 |
| Dosage of steroid per month just before surgery (>600 mg) | 6.26 | 1.09–52.78 | 0.039 |
