Table 3.

Pearson Correlation (Correlation P-value) Between Cardiac Parameters, Age at Diagnosis and Disease Duration (Defined as the Time from Date of Diagnosis to Date of Cardiac Magnetic Resonance Imaging).

	%L GE	Interventricular Septal Thickness (mm)	LV Mass / BSA (gm/m2’66)	LV Mass / BSA1’33* (gm/m2’66)	LV Mass /LVEDV (gm/ ml)	LV Mass /LVESV (gm/ ml)	Age at Diagnosis	Disease Duration (years)
%LGE	1.0
Interventricula r Septal Thickness (mm)	0.02 (0.8 7)	1.0
LV Mass / BSA (gm/m2)	0.27 (0.0 5)	0.730 (<0.001)	1.0
LV Mass / BSA1’33* (gm/m2)	0.28 (0.0 5)	0.70 (<0.001)	0.98 (<0.001)	1.0
LV Mass/LVEDV < 2% LGE. (gm/ml)	0.16 (0.2 6)	0.76 (<.0001)	0.91 (<.0001)	0.91 (<.0001)	1.0
LV Mass/LVESV (gm/ml)	0.05 (0.7 2)	0.67 (<.0001)	0.66 (<.0001)	0.67 (<.0001)	0.74 1.0 (<.00 01)	1.0
Age at Diagnosis (years)	- 0.13 (0.3 4)	0.08 (0.55)	0.02 (0.88)	-0.10 (0.47)	0.004 (0.98)	-0.03 (0.83)	1.0
Disease Duration	0.06 (0.6)	-0.07 (0.58)	0.04 (0.76)	0.04 (0.76)	-0.07 (0.64)	-0.08 (0.6)	−0.64*(<0.001)	1.0

^*Scaling factor 1.33 used per pediatric analysis of structural measurements adjusting for growth (21, 22)

Abbreviations: BSA, body surface area; LV, left ventricle; LVEDV, left ventricular end- diastolic volume; LVESV, left ventricular end-systolic volume; %LGE, percent late gadolinium enhancement.