Through the β coefficient gives the delirium probability p formula, which is: p = 1/{1 + exponent (−a)}.Among them, a = −7.6 + [multiple medications× 3.5] + [ST × 2.6] + [MMSE × 1.9] + [Alb × 1.8] + [Hct × 1.6] + [age × 0.6]。 According to β coefficient is assigned to each factor and added to get the total score. The total score range is 0–14, of which 0–3 is the low-risk group; 4–6 moderate risk group; 7–10: high-risk group; 11–14: a very high-risk group. Here, ALB is linked to delirium.