Resolution: standard / high
Figure 3.
Pooled data and quadratic regression analysis. Equation from quadratic regression analysis for serum free cortisol concentration = 0.024 × serum total cortisol concentration + 0.0000772 × total cortisol concentration2. Pearson correlation coefficient 0.88, p < 0.001.
Bendel et al. Critical Care 2008 12:R126 doi:10.1186/cc7084
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