Aguayo-Becerra et al. (2013) divided albumin levels into three groups: >30 g/L, 20–30 g/L, and <20 g/L in burn patients, and found that patients with albumin levels <20 g/L had a higher mortality risk, with 84% sensitivity and 83% specificity. Serra et al. (2014) found that low serum albumin level was an independent determinant of pressure ulcer occurrence in ICU patients. This evidence concerns the gene ALB and decubitus ulcer.