Effect of continuous intraoperative infusion of methoxamine on renal function in elderly patients undergoing gastrointestinal tumor surgery: a randomized controlled trial

Table 7 Cox proportional hazards regression analysis(30-d mortality)

Prognostic Factor	Univariate analysis		P value	Multivariate analysis		P value
Prognostic Factor	Unadjusted HR	95% confidence interval	P value	HR	95% confidence interval	P value
Age	1.24	1.09–1.42	0.001	1.25	1.04–1.50	0.017
Hypotension frequency	1.55	1.22–1.96	0.000	1.19	0.85–1.65	0.311
Duration of hypotension	1.07	1.02–1.12	0.004	1.03	0.95–1.11	0.513
AKI	14.57	2.66–79.56	0.002	18.12	2.60–126.39	0.003

Factors of P < 0.05 in the univariate analysis were included in the multivariate analysis. All the variables for regression analysis were listed in the chart, among which Age and AKI were significant risk factors for 30-d mortality in this study
HR Hazard ratio

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