TABLE 7.

Outcome with Hypothermia Treatment after Cardiac Arrest

Outcome	Normothermia	Hypothermia	Risk Ratio (95% CI)*	p Value†
	no./total no. (%)
Favorable neurologic outcome‡	54/137 (39)	75/136 (55)	1.40 (1.08 1.81)	0.009
Death	76/138 (55)	56/137 (41)	0.74 (0.58 0.95)	0.02

^*The risk ratio was calculated as the rate of a favorable neurologic outcome or the rate of death in the hypothermia group divided by the rate in the normothermia group

^†Two-sided p values are based on Pearson’s chi-square tests.

^‡A favorable neurologic outcome was defined as a cerebral performance category of 1 (good recovery) or 2 (moderate disability). One patient in the normothermia group and one in the hypothermia group were lost to neurologic follow-up.

CI = confidence interval.

From the Hypothermia After Cardiac Arrest Study Group. Mild therapeutic hypothermia to improve the neurologic outcome after cardiac arrest. N Engl J Med 346:557–563. Copyright © 2002, Massachusetts Medical Society. All rights reserved.