. Author manuscript; available in PMC: 2017 Jun 27.

Published in final edited form as: JAMA. 2016 Oct 4;316(13):1375–1382. doi: 10.1001/jama.2016.14380

Table 3. One-Year Outcomes and Model Results.

Results reported for mean cumulative survival over the first year and whether patients were alive at 1 year. Cumulative 1-year survival quantifies the area under the survival curve during the first year of follow-up.

	Hypothermia	No Hypothermia	PROPENSITY SCORE MODEL RESULTS						P for interaction^**
			Cumulative Survival Over First Year (months)			Alive at 1 Year
			Hypothermia	No Hypothermia	P	Relative Risk With Hypothermia	Risk Difference With Hypothermia	P^*
			Crude 1-Year Survival
All cardiac arrests	100/706 (14.2%)	286/2035 (14.1%)	2.21	2.20	0.92	1.00 (0.96, 1.03)	−0.1% (−3.1%, 2.9%)	0.94
Non-shockable arrests	60/537 (11.2%)	184/1587 (11.6%)	1.83	1.84	0.93	1.01 (0.97, 1.04)	0.5% (−2.7%, 3.6%)		0.53
Shockable arrests	40/169 (23.7%)	102/448 (22.8%)	3.44	3.44	0.99	0.97 (0.88, 107)	−2.2% (−9.7%, 5.4%)

For comparison of outcomes in the overall cohort

^**

Interaction between hypothermia and initial cardiac arrest rhythm tests whether the estimates of effect were different in the shockable and non-shockable rhythm subgroups