ALB and nosocomial infection: Serum albumin at admission (OR = 0.91; 95 % CI, 0.84 ~ 0.97; p = 0.008), mechanical ventilation (OR = 3.85; 95 % CI, 1.43 ~ 10.39; p = 0.008), severity of disease (OR = 3.79; 95 % CI, 1.03 ~ 13.99; p = 0.045) and PICU length of stay (OR = 1.23; 95 % CI, 1.11 ~ 1.35; p < 0.001) were also identified as significant risk factors for nosocomial infection.