Table 1.

Prearrest and Arrest Characteristics

Characteristic	All (n=221)	18-21 years (n=110)	22-25 years (n=39)	≥26 years (n=72)
Female, n (%)	85 (38)	43 (39)	20 (51)	22 (31)
Hospital Size (beds), n (%)
< 250	8 (4)	6 (5)	2 (5)	0 (0)
250-500	168 (76)	82 (75)	22 (57)	64 (89)
> 500	45 (20)	22 (20)	15 (38)	8 (11)
Pre-existing Conditions, n (%)
Respiratory insufficiency	120 (54)	56 (51)	25 (64)	39 (54)
Renal insufficiency	41 (19)	16 (15)	10 (26)	15 (21)
Cardiac disease	84 (38)	38 (35)	16 (41)	30 (42)
Illness category, n (%)
Medical cardiac	35 (16)	20 (18)	6 (15)	9 (13)
Surgical cardiac	49 (22)	18 (16)	10 (26)	21 (29)
Medical non-cardiac	91 (41)	61 (55)	18 (46)	12 (17)
Surgical non-cardiac	19 (9)	10 (9)	2 (5)	7 (10)
Trauma	27 (12)	1 (1)	3 (8)	23 (32)
Event Duration,* median (IQR), minutes	19 (6, 35)	23 (5.5, 38.5)	14 (6, 28)	13 (7, 29)
Location of Event, n (%)
ICU	132 (60)	68 (62)	28 (72)	36 (50)
Non-ICU patient wards	35 (16)	28 (25)	3 (8)	4 (6)
Perioperative	29 (13)	11 (10)	6 (15)	12 (17)
Other	25 (11)	3 (3)	2 (5)	20 (28)
Initial rhythm, n (%)
Asystole	61 (28)	30 (27)	8 (21)	23 (32)
PEA	72 (33)	35 (32)	14 (36)	23 (32)
VT/VF	65 (30)	32 (29)	11 (29)	22 (30)
Unknown/not documented	23 (10)	13 (12)	6 (15)	4 (6)
Medication Administration, n (%)
Epinephrine	187 (85)	91 (83)	33 (85)	63 (88)
Sodium bicarbonate	126 (57)	73 (66)	21 (54)	32 (44)
Calcium	110 (50)	61 (55)	15 (38)	34 (47)
Amiodarone/lidocaine	54 (25)	32 (29)	10 (25)	12 (17)
Other Interventions, n (%)
Defibrillation if shockable initial rhythm	61/65 (94)	29/32 (91)	10/11 (91)	22/22 (100)
Extracorporeal cardiopulmonary resuscitation (ECPR)	16 (7)	11 (10)	3 (8)	2 (3)

^*4 missing information on duration