TABLE 2.

Patient Demographics

Characteristics	n = 3 (Development)	n = 5 (Validation)
Age (yr), median (IQR)	67 (60–71)	67 (52–77)
Male, n (%)	1 (33)	2 (40)
ICU length of stay (d), median (IQR)	5 (1–5)	3 (2–5)
Type of surgery
Endocrine (pancreatic)	1	1
Gastrointestinal	1	2
Gynecologic	1
Thoracic		1
Orthopedics		1
Acute Physiology and Chronic Health Evaluation II score, median (IQR)	13 (12–28)	16 (10–21)

IQR = interquartile range.

Eight nonmechanically ventilated patients were included in this study. Data from three patients were used for development, and data from five patients were used for validation.