Table 3.

Biochemical parameters stratified by delirium status

	Delirium	No delirium	p-value
Biochemical parameters, mean (SD)a
Blood urea at admission, mg/dL	86.11 (67.57)	58.22 (50.97)	0.001
Blood urea at discharge, mg/dL	84.56 (70.15)	54.54 (45.25)	0.006
Hemoglobin at admission, g/dL	10.5 (2.7)	11.3 (2.6)	0.038
Hemoglobin at discharge, g/dL	10.0 (1.7)	10.8 (2.2)	0.030
Creatinine at admission, mg/dL	1.99 (1.66)	1.55 (1.56)	0.006
Osmolarity, mOsm/L, mean (SD)d	320.55 (23.20)	308.74 (17.37)	0.001

^aOnly statistical significant results are presented. Urea admission (Delirium, n = 57; No Delirium, n = 216); urea discharge (Delirium, n = 55; No Delirium, n = 212); hemoglobin admission (Delirium, n = 56; No Delirium, n = 221); hemoglobin discharge (Delirium, n = 56; No Delirium, n = 222); creatinine admission (Delirium, n = 57; No Delirium, n = 218). ^dPlasma osmolarity measures the body's electrolyte-water balance [osmolarity = (2*sodium) + (glucose/18) + (blood urea nitrogen/3)], normal range 270-310 mOsm/L. Osmolarity calculated only for patients with all variable (sodium, glucose and blood urea) measurements at admission (Delirium, n = 48; No Delirium, n = 175). SD = standard deviation.