.87; 95% CI, 1.00-3.49; p = 0.05; hazard ratio(3rd vs 1st quintile) = 1.92; 95% CI, 1.02-3.64; p = 0.04; hazard ratio(4th vs 1st quintile) = 2.12; 95% CI, 1.14-3.93; p = 0.02; and hazard ratio(5th vs 1st quintile) = 2.75; 95% CI, 1.47-5.15; p<0.01; p for trend<0.01). For both admission and day 3 copeptin, association with 1-year mortality existed for out-of-hospital cardiac arrest of cardiac origin only (p for interaction = 0.05 and<0.01, respectively)