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. Author manuscript; available in PMC: 2011 Jan 5.
Published in final edited form as: Circulation. 2009 Dec 21;121(1):34–42. doi: 10.1161/CIRCULATIONAHA.109.869396

Table 3.

Association between CHQ Physical Functioning Summary Score and MRI*

Univariable Multivariable**
Variable PE p PE p Reliability***
  Total ESV indexed to BSA1.3 (mL/m2) −0.057 0.30 0.437 0.03 36%
 (Total ESV/BSA1.3)2 −0.006 0.004 56%
  Total EDV indexed to BSA1.3 (mL/m2) −0.006 0.87
  Total stroke volume (mL) 0.045 0.19
  Total ejection fraction (per cent) 0.075 0.43
  Cardiac output (L/min) 0.326 0.52
  Total ventricular mass indexed to BSA1.3 (gm/m2) −0.099 0.02
  Total mass/EDV ratio (gm/mL) −7.068 0.02 −8.366 0.004 56%

BSA, body surface area; EDV, end-diastolic volume; ESV, end-systolic volume; gm, grams; L, litres; m, meters; mL, milliliters; min, minute; PE, parameter estimate.

Parameter estimates represent the degree of change in the Summary Score associated with a one integer unit change in the laboratory testing variable.

*

Analysis limited to 155 subjects with values for the 7 variables. Missing values were not imputed.

**

R2=0.12 (R2 adjusted=0.11), p<0.001 (n=153). Final multivariable model includes a significant quadratic term for total end-systolic volume indexed to BSA1.3, indicating a non-linear relationship.

***

From bootstrap bagging (presented for the variables included in the multivariable model)