Predictive modeling for postoperative delirium in elderly patients with abdominal malignancies using synthetic minority oversampling technique

Table 3 Results of multivariate logistic regression analysis enhanced by synthetic minority oversampling technique

Related indicator	β	SE	Wald	P value	OR	95%CI
						Lower	Upper
Charlson comorbidity index	0.527	0.522	6.313	0.012	1.693	1.494	5.388
American Society of Anesthesiologists classification	0.544	0.576	10.844	0.009	1.723	1.536	6.775
History of cerebrovascular diseases	1.167	0.613	10.142	0.003	3.212	1.930	3.397
Duration of surgery	1.154	0.565	5.685	0.025	3.170	2.326	7.894
Perioperative blood transfusion	1.007	0.558	13.022	0.001	2.737	1.247	3.682
Postoperative pain score	1.132	0.822	11.912	0.001	3.101	2.092	12.064

SE: Standard error; OR: Odds ratio; CI: Confidence interval; β: Beta coefficient.