Table 1.

Demographic and Clinical Characteristics of Patients by Group (N=37)

	PST-DEX (n=17)	Usual Care (n=20)	p-value
Age, mean (SD), y	53.4 (15.3)	48.3 (14.9)	.31
Gender: male, No. (%)	9 (52.9)	13 (65.0)	.46
APACHE III score, mean (SD)	65.6 (32.0)	55.2 (33.3)	.34
Total days in ICU, mean (range), d	16.5 (3–40)	15.5 (3–45)	.16
Total mechanical ventilator days, mean (range), d	3.9 (1–12)	6.7 (1–24)	.08
Length of ICU stay prior to study enrollment, mean (range), d	8.1 (1–36)	9.9 (0–32)	.77
Length of ventilator support prior to study enrollment, mean (range), d	3.9 (0–20)	7.8 (0–25)	.18
Length of time enrolled on protocol, mean (range), d	3.1 (1–5)	3.6 (1–5)	.99