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. Author manuscript; available in PMC: 2015 Mar 1.
Published in final edited form as: J Thorac Cardiovasc Surg. 2013 Apr 11;147(3):1002–1007. doi: 10.1016/j.jtcvs.2013.03.022

Table 5.

Selected predictors of the cooling time required to achieve electrocerebral inactivity (multivariable linear regression model, n=228, r2=0.21).

Variable Parameter estimate Standard error T Value P Value
Age (years) 0.05 0.08 0.60 0.55
Male 3.57 2.82 1.26 0.21
White race 7.21 2.89 2.50 0.01
Body surface area (m2) 18.46 4.52 4.09 < 0.0001
History of prior stroke −5.93 3.79 −1.57 0.12
Peripheral vascular disease −1.64 5.23 −0.31 0.75
Baseline hemoglobin (g/dl) −0.87 0.72 −1.21 0.23
NP temperature at start of cooling (°C) 2.77 1.08 2.57 0.01
PaCO2 during cooling (mm Hg) −0.28 0.24 −1.17 0.24

NP = nasopharyngeal; PaCO2 = arterial carbon dioxide tension.