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Table 4 Regression analyses for distance walked in 6MWT

From: Cardiac MRI-based right-to-left ventricular blood pool T2 relaxation times ratio correlates with exercise capacity in patients with chronic heart failure

Variable

Univariate hazard ratio

p-value

Multivariate hazard ratio

p-value

Demographics

 Sex

− 60.9 (− 90.5, − 31.3)

< 0.001

− 49.4 (− 69.8, − 29.0)

< 0.001

 Age

− 58.5 (− 85.2, − 31.8)

< 0.001

− 29.7 (− 48.8, − 10.6)

0.003

 BMI

− 4.0 (− 34.5, 26.4)

0.792

 BSA

20.7 (− 10.7, 52.1)

0.193

 Smoker status

20.2 (− 8.0, 48.4)

0.157

 NYHA class

− 58.8 (− 87.2, − 30.5)

< 0.001

− 0.5 (− 29.5, 17.3)

0.603

 BNP

− 27.3 (− 58.3, 3.8)

0.084

CMR

 LVEDVi (ml/m2)

17.0 (− 13.6, 47.6)

0.271

 LVESVi (ml/m2)

3.7 (− 26.1, 33.4)

0.804

 LVMi (g/m2)

17.6 (− 14.1, 49.3)

0.272

 LVCI (ml/min/m2)

43.4 (13.4, 73.3)

0.005

15.8 (− 4.3, 36.0)

0.121

 LVEF (%)

14.0 (− 18.5, 46.4)

0.394

 RVEDVi (ml/m2)

− 7.6 (− 39.5, 24.3)

0.637

 RVESVi (ml/m2)

− 4.6 (− 36.6, 27.3)

0.773

 RVCI (ml/min/m2)

− 6.1 (− 38.1, 25.8)

0.702

 RVEF (%)

− 3.8 (− 35.8, 28.1)

0.811

 Native T1 (ms)

6.5 (− 26.3, 39.4)

0.693

 ECV (%)

22.4 (− 11.1, 55.9)

0.186

 Scar burden (%)

8.6 (− 23.3, 40.5)

0.594

 RV/LV T2 ratio

104.0 (73.8, 134.3)

< 0.001

84.8 (56.2, 113.4)

< 0.001

Baseline physiology

 RRsys (mmHg)

1.2 (− 30.3, 32.7)

0.940

 HR (min−1)

− 18.8 (− 50.3, 12.6)

0.235

 SpO2 (%)

19.4 (− 12.2, 51.1)

0.225

  1. 6MWT 6-min walk test, BMI body mass index, BSA body surface area, NYHA New York Heart Association, BNP brain natriuretic peptide, CMR cardiac magnetic resonance imaging, LV left ventricular, EDVi end-diastolic volume index, ESVi end-systolic volume index, CI cardiac output index, EF ejection fraction, RV right ventricular, ECV extracellular volume fraction, RRsys systolic blood pressure, SpO2 peripheral capillary oxygen saturation
  2. Significant predictors are highlighted in bold