Number of deaths
None showed a significant difference (P > 0.05) and both
with low heterogeneity (I2=0%). The time operate surgery <3
month vs. >=3 month (OR, 1.91; 95% Cl, 0.26 to 14.26);The
time operate surgery <6 month vs. >=6 month (OR,
0.73; 95% Cl, 0.10 to 5.35).