TABLE 6.

Cox regression analysis of risk factors for patients with CRKP infection for 28-day mortality.

Variables	Without propensity score adjustment		Adjusted for the propensity score for CAZ-AVI-base treatment
	p-value	OR (95% CI)	p-value	OR (95% CI)
CAZ/AVI-based regimen	0.005	0.178 (0.053–0.601)	0.003	0.153 (0.045–0.521)
Length of hospital stay after CRKP infection (days)	<0.001	0.928 (0.896–0.961)	<0.001	0.927 (0.893–0.926)
Creatinine clearance (ml/min)	0.019	0.99 (0.981–0.998)	0.023	0.989 (0.98–0.998)

Abbreviations: CRKP, carbapenem-resistant Klebsiella pneumonia; OR, odds ration; CI, confidence interval, CAZ/AVI, Ceftazidime-avibactam.