Mortality rate
Twelve studies reported the mortality rate among 4740 patients.9-12,16-23 Meta-analysis showed that there was no
significant difference in mortality rate between the prophylactic
antibiotics group and the control group [RR 1.03 (95% CI: 0.91-1.16,I2 =1%; Figure 3)]. Consistent results were
observed between the subgroups of different administration times.