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. Author manuscript; available in PMC: 2012 Nov 1.
Published in final edited form as: Stroke. 2011 Aug 18;42(11):3087–3092. doi: 10.1161/STROKEAHA.111.623165

Table 3.

Multivariable Model for Predicting Brain Tissue Hypoxia

Brain Tissue Hypoxia
Adjusted OR (95%-CI) P Value
ETCO2 <34 mmHg 1.4 (1.2–1.8) < 0.01
Ranges of CPP
 >100 mmHg Reference group
 90–100 mmHg 1.0 (0.8–1.3) 0.97
 80–90 mmHg 1.3 (0.9–1.7) 0.11
 70–80 mmHg 1.5 (1.1–2.1) 0.01
 60–70 mmHg 1.7 (1.2–2.5) <0.01
 <60 mmHg 1.8 (1.3–2.4) <0.01

Multivariable model using GEE adjusted for the variables listed. P values in bold are significant. ETCO2, end tidal carbon dioxide; PRx, pressure reactivity index; CPP, cerebral perfusion pressure.