GFAP and cardiac arrest: Concentrations of the following biomarkers were associated with unfavorable 1-year outcomes: NfL on post–cardiac arrest day 1 (adjusted odds ratio [aOR], 5.91; 95% CI, 1.82-19.19), day 2 (aOR, 11.88; 95% CI, 3.82-36.92), and day 3 (aOR, 10.22; 95% CI, 3.14-33.33; UCH-L1 on day 2 (aOR, 11.27; 95% CI, 3.00-42.36) and day 3 (aOR, 7.56 ; 95% CI, 2.11-27.09); GFAP on day 2 (aOR, 2.31; 95% CI, 1.19-4.48) and day 3 (aOR, 2.19; 95% CI, 1.19-4.03); and tau on day 1 (aOR, 2.44; 95% CI, 1.14-5.25), day 2 (aOR, 2.28; 95% CI, 1.31-3.97), and day 3 (aOR, 2.04; 95% CI, 1.16-3.57).