Table 1:

Characteristics at first visit that included a cardiac MRI

	Duchenne Muscular Dystrophy Median (IQR*) or N (%)
Age (years)	12.5 (10.3, 15.4) Range (7.4–27.5)
Height (cm)	145 (127, 155)
Weight (kg)	48.8 (34.7, 61.3)
Male gender	100%
Current or prior corticosteroid use	81% (N=63)
Current cardiac medications
Angiotensin converting enzyme inhibitor	62% (N=48)
Angiotensin receptor blocker	9% (N=7)
Beta-Blocker	31% (N=24)
Aldosterone inhibitor	9% (N=7)
Ambulatory	31% (N=24)
Positive pressure ventilation	9% (N=7)
Mortality	15 (19%)

^*IQR – interquartile range