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Table 4 Univariable unadjusted models: BPV parameters

From: Cardiac surgical outcome prediction by blood pressure variability indices Poincaré plot and coefficient of variation: a retrospective study

Outcome: Mortality

Outcome: Renal Failure

Variable

C-statistic AUC (95% CI)

P value

C-statistic AUC (95% CI)

P value

Systolic Blood Pressure CV

Pre-Bypass CV

0.541 (0.476–0.606)

0.011*

0.564 (0.504–0.623)

0.012*

Post-Bypass CV

0.621 (0.567–0.676)

<  0.001*

0.599 (0.537–0.660)

< 0.001*

Mean Arterial Pressure CV

Pre-Bypass CV

0.520 (0.459–0.582)

0.127

0.522 (0.463–0.580)

0.165

Bypass CV

0.494 (0.428–0.559)

0.030*

0.499 (0.438–0.561)

0.085

Post-Bypass CV

0.570 (0.517–0.623)

0.123

0.548 (0.493–0.602)

0.181

Systolic Blood Pressure SD1

Pre-Bypass SD1

0.536 (0.470–0.602)

0.699

0.538 (0.477–0.599)

0.445

Post-Bypass SD1

0.518 (0.458–0.578)

0.548

0.513 (0.455–0.570)

0.856

Mean Arterial Pressure SD1

Pre-Bypass SD1

0.490 (0.427–0.552)

0.615

0.546 (0.484–0.608)

0.368

Bypass SD1

0.546 (0.484–0.608)

0.425

0.480 (0.419–0.541)

0.256

Post-Bypass SD1

0.539 (0.482–0.595)

0.401

0.535 (0.480–0.591)

0.088

Systolic Blood Pressure SD2

Pre-Bypass SD2

0.544 (0.479 to 0.610)

0.013*

0.479 (0.416–0.541)

0.124

Post-Bypass SD2

0.624 (0.563–0.685)

< 0.001*

0.584 (0.520–0.649)

< 0.001*

Mean Arterial Pressure SD2

Pre-Bypass SD2

0.530 (0.467–0.592)

0.015*

0.500 (0.436–0.564)

0.982

Bypass SD2

0.501 (0.434–0.569)

0.203

0.518 (0.455–0.580)

0.015*

Post-Bypass SD2

0.580 (0.524–0.637)

0.030*

0.491 (0.434–0.547)

0.360

  1. *Statistically significant at a level of significance of P < 0.05; BPV blood pressure variability, AUC Area under the receiver operating curve, CI 95% Confidence Interval, CV Coefficient of Variation, SD1 Short term variability, SD2 Long term variability