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Fig. 3 | Journal of Cardiothoracic Surgery

Fig. 3

From: Comparison of non-invasive to invasive oxygenation ratios for diagnosing acute respiratory distress syndrome following coronary artery bypass graft surgery: a prospective derivation-validation cohort study

Fig. 3

Scatter plots for S/F vs. P/F ratios (top) and PA/F vs. P/F ratios (bottom) for the validation data set. The S/F vs. P/F line of best fit equals (S/F = 43.309 + 0.869PF); (R2 0.909; F 3565.427; < 0.0001); (< 0.0001; r = 0.954); whereas the PA/F vs. P/F line of best fit equals (PAFR = − 1.537 + 2.435PFR); (R2 0.493; F 345.762; < 0.0001); (< 0.0001; r = 0.702)

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