Table 4.

Forward stepwise logistic regression analysis

	Regression coefficient	Odds ratio	95% Confidence limit	P-value
Increased frequency	1.42835	4.171808	2.0–8.6	0.000122
Abdominal pain	0.829582	2.292359	1.0–5.1	0.039574
Bright blood Pr	−0.59131	0.553602	0.2–1.3	0.155779
Blood separate	−0.72156	0.485993	0.2–1.1	0.0961