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Table 3 Results of statistical modeling and likelihood tests

From: Volume infusion cooling increases end-tidal carbon dioxide and results in faster and deeper cooling during intra-cardiopulmonary resuscitation hypothermia induction

  Test of fixed effects Likelihood ratio test
Measurement Intercept Time Cooling group Interaction Chi-square DF p value
MAP [mmHg] 29.3 −0.01 ± 0.04 5.9 ± 1.3 −0.02 ± 0.002 77.0 2 <2.2E−16
RAP [mmHg] 18.3 0.1 ± 0.02 2.8 ± 0.8 −0.08 ± 0.008 78.3 2 <2.2E−16
CPP [mmHg] 7.2 −0.1 ± 0.05 5.5 ± 1.7 −0.1 ± 0.03 24.5 2 4.7E−6
EtCO2 [mmHg] 24.7 0.3 ± 0.04 24.7 ± 3.5 −0.2 ± 0.02 80.0 2 <2.2E−16
BrainT [°C] 34.6 −0.2 ± 0.003 0.2 ± 0.2 0.06 ± 0.002 838.4 2 <2.2E−16
EsoT [°C] 35.9 −0.2 ± 0.003 0.2 ± 0.2 0.06 ± 0.002 838.4 2 <2.2E−16
RecT [°C] 39.4 −0.1 ± 0.001 −1.5 ± 0.1 0.003 ± 0.0007 1066.2 2 <2.2E−16
  1. Statistically significant (p < 0.05) effects are presented in italicized text. Likelihood test shows that inclusion of cooling group and interactions between cooling group and time in the model significantly reduced the residual error relative to a model that depended only on time