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Table 3 Comparison of regurgitant fraction (RF) measured by the indirect and direct methods

From: Direct measurement of atrioventricular valve regurgitant jets using 4D flow cardiovascular magnetic resonance is accurate and reliable for children with congenital heart disease: a retrospective cohort study

 

Spearman (ρ)

WSRT

Median difference (IQR)

Absolute Median difference (IQR)

VOL vs. AIMstat

ρ = 0.69

p = 0.027

4.34% (− 2.02–15.73)

8.97% (4.07–21.94)

VOL vs. AIMtrack

ρ = 0.70

p = 0.006

6.87% (0.24–14.97)

11.70% (4.80–23.69)

VOL vs. JET

ρ = 0.73

p = 0.624

−1.49% (− 8.34–7.21)

8.24% (3.90–14.98)

AIMstatvs. AIMtrack

ρ = 0.98

p < 0.001

1.67% (0.12–4.27)

1.88% (1.19–4.27)

AIMstatvs. JET

ρ = 0.80

p = 0.005

−3.57% (− 12.03–1.75)

7.52% (2.25–13.45)

AIMtrackvs. JET

ρ = 0.80

p < 0.001

−5.80% (− 13.65 – − 0.32)

7.40% (3.11–13.65)

  1. Differences are calculated in the order presented (ex: VOL vs. JET = VOL-JET). VOL Volumetry method, AIMstat Annular inflow method by static plane, AIMtrack Annular inflow method by valve-tracking plane, JET Direct measurement of the atrioventricular regurgitant jet, IQR Interquartile range, WSRT Wilcoxon signed rank test