Table 1. Demographics of the 200,859 unit admissions in the database.

Data	Median [IQR], Mean (STD), or Number (%)
Note that multiple unit admissions can correspond to the same patient.
Age, years (median [IQR])	65.00 [53.00,76.00]
Unit length of stay, days (median [IQR])	1.57 [0.82,2.97]
Hospital length of stay, days (median [IQR])	5.49 [2.90,10.04]
Admission height, cm (mean (std))a	169.25 (13.69)
Admission weight, kg (mean (std))a	83.93 (27.09)
Gender (n (%))
Male	108,379 (53.96)
Female	92,303 (45.95)
Other or Unknown	177 (0.09)
Ethnicity (n (%))
African American	21,308 (10.61)
Asian	3,270 (1.63)
Caucasian	155,285 (77.31)
Hispanic	7,464 (3.72)
Native American	1,700 (0.85)
Other/Unknown	11,832 (5.89)
Hospital discharge year (n (%))
2014	95,513 (47.55)
2015	105,346 (52.45)
Unit type (n (%))
Coronary Care Unit/Cardiothoracic ICU	15,290 (7.61)
Cardiac Surgery ICU	9,625 (4.79)
Cardiothoracic ICU	6,158 (3.07)
Cardiac ICU	12,467 (6.21)
Medical ICU	17,465 (8.70)
Medical-Surgical ICU	113,222 (56.37)
Neurological ICU	14,451 (7.19)
Surgical ICU	12,181 (6.06)
Status at unit discharge (n (%))
Alive	189,918 (94.55)
Expired	10,907 (5.43)
Unknown	34 (0.02)
Status at hospital discharge (n (%))
Alive	181,104 (90.16)
Expired	18,004 (8.96)
Unknown	1,751 (0.87)

^aMissing data excluded from calculation.