ALB and infection: The results of the statistical bivariate analysis showed that patients who had received an appropriate prophylaxis were older (t = −2.83; 402 df; p = 0.005), with an immunosuppression status (χ2 = 8.85; 1 df; p = 0.003), with a low serum albumin (χ2 = 29.3; 1 df; p<0.0001), and with a clinical infection (χ2 = 16.65; 1 df; p<0.0001).