Variables Odds ratio (95% CI) P value GCS 0.681 0.535-0.866 0.002 Initial COHb level 1.053 0.976-1.136 0.185 MetHb ≧ 0.8 21.2 3.080 – 145.943 0.002 White blood count 1.00 1.000-1.000 0.407 Troponin I 9.63 1.081-85.796 0.042 PH value 0.00 0.000-3.719 0.07 GCS indicates Glasgow coma scales; CI, confidence interval.

Table 3: Univariate analysis of Predictive risk factors of DNS development.