Table 1.

Results of the statistical analyses.

Criteria	Patient	Gangrene	Statistical analysis	OR with 95% CI
Under 60 years of age (RC)	217	128 (59.0%)	Chi-squared test, P: .324 Non-significant	1.21 (0.83–1.78)
60 years of age and older	225	143 (63.6%)
Male	364	225 (61.8%)	Chi-squared test, P: .640 Non-significant	1.13 (0.68–1.85)
Female (RC)	78	46 (59.0%)
No history of volvulus	320	198 (61.9%)	Chi-squared test, P: .694 Non-significant	1.09 (0.71–1.67)
History of volvulus (RC)	122	73 (59.8%)
No history of abdominal surgery (RC)	371	225 (60.6%)	Chi-squared test, P: .512 Non-significant	1.19 (0.70–2.03)
History of abdominal surgery	71	46 (64.8%)
No pregnancy	69	44 (63.8%)	Fisher exact test, P: .028 Significanta	6.16 (1.19–31.96)
Presence of pregnancy (RC)	9	2 (22.2%)
No comorbid disease (RC)	328	189 (57.6%)	Chi-squared test, P: .007 Highly significant	1.88 (1.19–3.00)
Presence of comorbid disease	114	82 (71.9%)
No shock (RC)	337	187 (55.5%)	Chi-squared test, P: .000 Highly significant	3.21 (1.90–5.42)
Presence of shock	105	84 (80.0%)
Symptom period <24 hrs (RC)	88	45 (51.1%)	Chi-squared test, P: .029 Significant	1.69 (1.05–2.70)
Symptom period ≥24 hrs	354	226 (63.8%)
Volvulus in clockwise direction (RC)	167	101 (60.5%)	Chi-squared test, P: .821 Non-significantb	1.05 (0.68–1.62)
Volvulus in counterclockwise direction	180	111 (61.7%)
Volvulus degree <360° (RC)	102	52 (51.0%)	Chi-squared test, P: .013 Significantb	1.81 (1.13–2.89)
Volvulus degree ≥360°	245	160 (65.3%)
No ileosigmoid knotting (RC)	442	271 (61.3%)	Chi-squared test, P: .001 Highly significantc	2.66 (1.44–4.91)
Presence of ileosigmoid knotting	73	59 (80.8%)

OR: Odds ratio, CI: Confidence interval, RC: Reference category

^aIn 78 female patients,

^bIn 212 patients for whom information was available,

^cSigmoid colon and/or ileum gangrene.