Establishing and clinically validating a machine learning model for predicting unplanned reoperation risk in colorectal cancer

Table 2 Multiple logistic regression analysis

	β	SE	χ2	P value	OR	95%CI
						Lower	Upper
Age	1.072	0.335	10.268	0.001	2.922	1.516	5.63
Gender	-0.717	0.301	5.674	0.017	0.488	0.27	0.881
History of hypertension	0.592	0.278	4.545	0.033	1.807	1.049	3.115
History of stroke	0.306	0.392	0.61	0.435	1.358	0.63	2.926
History of laparotomy	0.939	0.297	9.986	0.002	2.557	1.428	4.576
Hypoproteinemia	0.918	0.357	6.59	0.010	2.504	1.242	5.045
TNM staging	-0.286	0.275	1.081	0.299	0.751	0.438	1.288
ASA classification	-0.308	0.396	0.605	0.437	0.735	0.339	1.597
Surgical time	0.509	0.276	3.387	0.066	1.663	0.967	2.859
PNI	2.476	0.369	45.073	< 0.001	11.894	5.773	24.505

TNM: Tumor-node-metastasis; ASA: American Society of Anesthesiologists; PNI: Prognostic nutritional index.