A novel scoring system for predicting the neurologic prognosis prior to the initiation of induced hypothermia in cases of post-cardiac arrest syndrome: the CAST score

Table 1 Baseline Characteristics of the Learning and Validation Data Sets

Variable	Learning data set		Validation data set
Variable	Nagoya n = 54	Chutouen n = 23	Komaki n = 10	Maebashi n = 64
Demographics
Age, yr	62.5 (52.0-70.0)	67.0 (55.5-75.0)	47.0 (27.0-51.0)	61.0 (52.0-72.0)
Length of stay in hospital, d	27.5 (17.0-52.3)	24.0 (9.0-52.0)	11.5 (5.8-52.5)	30.5 (18.0-67.5)
Condition of cardiac arrest
Witness, n (%)	43 (79.6)	18 (78.3)	8 (80.0)	51 (79.7)
Bystander, n (%)	28 (51.9)	15 (65.2)	4 (40.0)	36 (56.3)
Initial rhythm, shockable, n (%)	30 (55.6)	8 (36.4)	4 (40.0)	45 (70.3)
Duration of resuscitation effort, min	20.0 (13.0-30.0)	20.5 (11.0-39.3)	24.0 (12.5-33.3)	15.0 (9.0-30.0)
Time to reach target temperature after cardiac arrest, hour	5.0 (3.5-6.0)	4.8 (4.0-6.8)	6.0 (4.0-8.0)	5.0 (3.0-8.0)
Outcome
Good (CPC ≤ 2), n, (%)	23 (42.6)	11 (47.8)	3 (30.0)	27 (42.2)
Poor (CPC ≥ 3), n, (%)	31 (57.4)	12 (52.2)	7 (70.0)	37 (57.8)

Data are presented as the median and interquartile ranges (25–75% percentile) or as absolute frequencies with percentages. Nagoya Nagoya University Hospital, Chutouen Chutouen General Medical Center, Komaki Komaki City General Hospital, Maebashi Japan Red Cross Maebashi Hospital