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Table 4 The predictive accuracy of pH for 1-month survival

From: Predictive accuracy of biomarkers for survival among cardiac arrest patients with hypothermia: a prospective observational cohort study in Japan

Cutoff Se Sp TP TN FP FN LR+ LR- PPV NPV
7.3 0.14 0.97 6 640 20 38 4.5 0.89 0.23 0.94
7.2 0.20 0.95 9 625 35 35 3.9 0.84 0.20 0.95
7.1 0.43 0.89 19 589 71 25 4.0 0.64 0.21 0.96
7.0 0.68 0.81 30 537 123 14 3.7 0.39 0.20 0.97
6.9 0.91 0.70 40 464 196 4 3.1 0.13 0.17 0.99
6.8 0.95 0.53 42 349 311 2 2.0 0.09 0.12 0.99
6.7 0.98 0.35 43 229 431 1 1.5 0.07 0.09 1.00
  1. TP True-positive, TN True-negative, FP False-positive, FN False-negative, Se Sensitivity, Sp Specificity, LR+ Positive likelihood ratio, LR Negative likelihood ratio, PPV Positive predictive value, NPV Negative predictive value