Incidence, Patient-Related Risk Factors, and Outcomes of Postoperative Pneumonia after Cholecystectomy: A Population-Based Cohort Study

Table 5

Mortality rates of patients after cholecystectomy with or without pneumonia.

	Without pneumonia ()	With pneumonia ()	value
	(%)	(%)
Mortality (1 month)	416 (1.72%)	138 (2.28%)	0.0035
Mortality (2 months)	276 (1.14%)	92 (1.52%)	0.0158
Mortality (3 months)	157 (0.65%)	53 (0.88%)	0.0569

The log-rank test was used to examine the differences in the mortality rates of the 1 : 4 case-control match after cholecystectomy.