Table 2.

Independent variable assignment table.

Variables	Assignment description
Age	<60 = 1, ≥60 = 2
GCS score	>8 = 1, 6–8 = 2, 3–5 = 3
APACHE II score	<20 = 1, ≥20 = 2
Hyperglycemia	≤11.1 = 1, >11.1 = 2
Serum albumin	≥30 = 1, <30 = 2
Tranquilizers	No = 0, Yes = 1
Mechanical ventilation	No = 0, Yes = 1
Route of feeding	nasoenteric tube = 1, nasogastric tube = 2
Temperature status (hyperthermia ≥38.5)	No = 0, Yes = 1
Serum lactate	Substitute the original value
Potassium	≥3.5 = 1, <3.5 = 2