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Table 4 Correlations and multivariate linear regression coefficients

From: Blood correction reduces variability and gender differences in native myocardial T1 values at 1.5 T cardiovascular magnetic resonance – a derivation/validation approach

Characteristic Univariate r Multivariate beta Multivariate beta, final model Global R2
Derivation cohort (n = 200)     0.26 (p < 0.001)
Hematocrit (%) −0.37 (p < 0.001) 0.00 (p = 0.98)   
Mean blood R1 (ms-1) −0.45 (p < 0.001) −0.28 (p = 0.003) −0.28 (p = 0.001)  
Mean blood R1* (ms-1) −0.45 (p < 0.001) −0.28 (p = 0.002) −0.28 (p = 0.001)  
Septal wall thickness (mm) 0.07 (p = 0.33) - -  
Validation cohort (n = 200)
Hematocrit (%) −0.39 (p < 0.001)    
Mean blood R1 (ms-1) −0.49 (p < 0.001)    
Mean blood R1* (ms-1) −0.44 (p < 0.001)    
Septal wall thickness (mm) 0.07 (p = 0.32) - -  
  1. All blood measurements correlated with myocardial T1, however hematocrit was not significant in multivariate regression analysis, and therefore not included in the final model.