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Table 3 Cox proportional hazards model (Cox Regression) for analysis of effect of ROX Index ≥12.85 on SO at days 2, 4 and 7 and severity scores

From: The ROX index as a predictor of standard oxygen therapy outcomes in thoracic trauma

 

HR

95%CI

P-value

Unadjusted ROX index ≥12.85

 At day 2

0.03

0.009–0.095

<  0.0001

 At day 4

0.06

0.025–0.129

<  0.0001

 At day 7

0.06

0.027–0.129

<  0.0001

Adjusted by ISS

 At day 2

0.03

0.010–0.106

<  0.0001

 At day 4

0.06

0.034–0.141

<  0.0001

 At day 7

0.06

0.029–0.137

<  0.0001

Adjusted by AIS thorax

 At day 2

0.03

0.010–0.106

<  0.0001

 At day 4

0.06

0.027–0.139

<  0.0001

 At day 7

0.06

0.029–0.136

<  0.0001

Adjusted by TTSS

 At day 2

0.04

0.012–0.142

<  0.0001

 At day 4

0.07

0.034–0.187

<  0.0001

 At day 7

0.08

0.036–0.182

<  0.0001

Adjusted by SAPS II

 At day 2

0.04

0.013–0.146

<  0.0001

 At day 4

0.08

0.034–0.190

<  0.0001

 At day 7

0.06

0.029–0.136

<  0.0001

  1. ISS Injury severity score; AIS Abbreviated injury scale; TTSS Thoracic trauma severity score; SAPS II Simplified acute physiology score II