Table 3.

The results of univariate analysis of categorical data

Factors	Odds ratio	95%CI	P
Gender (male)	1.35	0.85–2.15	0.45
Age at initial surgery (>32 years)	4.04	0.75–21.89	0.13
Disease duration (<6 years)	1.79	0.39–8.27	0.45
Type of disease (chronic continuous)	2.35	0.48–11.35	0.36
Type of disease (relapse–remitting)	0.42	0.09–1.89	0.42
Type of disease (acute fulminating)	1.40	0.14–13.8	0.58
Extent of colitis (left-sided colitis)	2.24	0.37–13.36	0.33
Severity of colitis (severe)	1.30	0.23–7.36	0.67
Total dosage of steroid before surgery (>8 g)	1.08	0.24–4.76	1.00
Dosage of steroid per month just before surgery (>600 mg)	4.12	0.88–19.82	0.10
Use of immunomodulator (Y)	1.45	0.33–6.44	0.71
Emergency or urgent operation at first operation (Y)	0.56	0.06–5.00	1.00
Operation stages (two stage)	3.22	0.37–28.24	0.42
Operation stages (three stage)	0.41	0.05–3.57	0.67
Postoperative pelvic abscess (Y)	1.22	0.13–11.27	1.00