[Retracted] Elevated Substance P Is a Risk Factor for Postoperative Delirium in Patients with Hip Fracture

Table 2

Prevalence of delirium in quartile categories of postoperative substance P levels.

Variable	Q1	Q2	Q3	Q4	values
Delirium, (%)	10 (27.03)	12 (32.43)	15 (40.54)	20 (54.05)	<0.001