Incidence of cardiac arrests and unexpected deaths in surgical patients before and after implementation of a rapid response system

Annals of Intensive Care

Table 1 Characteristics of study population before (period 1) and after (period 2) implementation of an RRS

	period 1		period 2		p- value
	n = 1376		n = 2410		p- value
age (SD)	55.4	(16.8)	58.0	(16.8)	<0.001*
gender, male (%)	688	(50.0)	1295	(53.7	0.027*
ASA (SD)	2.1	(0.8)	2.2	(0.8)	<0.001*
LOS hospital (IQR)	7.0	(5.0-13.0)	7.0	(5.0-13)	0.265
in-hospital deaths (per 1000 admissions)	18	(13.1)	37	(15.3)	0.573
total ICU admissions (per 1000 admissions)	145	(10.5)	286	(11.9)	0.215
ICU admissions not due to an SAE (%)	111	(8.1)	186	(7.7)	0.701

SD = standard deviation ASA = American Society of Anesthesiologists classification LOS = length of stay in days.
* statistically significant at = <0.05.