This datum corroborates that of a retrospective cross-sectional study conducted in the United Kingdom with 710 patients ≥ 70 years of age, in which there was a strong association between high CRP levels and delirium, independent of other risk factors for it (OR 1.32; CI 95% 1.10 to 1.58, p = 0.003)(24). This evidence concerns the gene CRP and delirium.