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. Author manuscript; available in PMC: 2012 Apr 1.
Published in final edited form as: J Cardiothorac Vasc Anesth. 2011 Apr;25(2):238–242. doi: 10.1053/j.jvca.2010.04.021

Figure 3.

Figure 3

Phasic variation of the mean arterial pressure during BiVP optimization using 38 settings in Phase 1 of the BiPACS trial. Data for 15 patients; we first used an additive mixed effects model allowing a flexible trend. If this model suggested a linear trend, we used a linear mixed effects model. Random subject effects were included in both models to account for the within-subject correlation due to repeated measures from the same subject. There is a significant nonlinear trend (p<0.001).