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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