ALB and infection: In organ space SSI subgroup, the infection rate was 0.37 % (10/2688) in the albumin <3.5 g/dL group and 0.17 % (100/58,642) in the albumin >3.5 g/dL group, (RR = 2.17, 95 % CI [1.13 4.15], Z = 2.34, p = 0.02 in a fixed model (I2 = 18 %) (Fig. 3).