Table 3.

Rate of change of appendicular lean mass (kg) and appendicular lean mass index (kg/m²) in four age groups of patients. With DMD (N = 466), DMD intermediate (N = 33), and BMD (N = 46).

	DMD intermediate (DMDI)		DMD		BMD		P‐values
	N = 33		N = 466		N = 46
Age (years)	Estimate	SE	Estimate	SE	Estimate	SE	DMDI vs. DMD	DMDI vs. BMD	DMD vs. BMD
ALM
5 to <7	0.74	0.23	0.66	0.07	1.08	0.46	0.7388	0.5081	0.3643
7 to <10	0.35	0.11	0.44	0.03	0.70	0.19	0.4379	0.1037	0.1594
10 to <14	0.68	0.08	0.28	0.02	1.86	0.13	<0.0001	<0.0001	<0.0001
14 to <20	0.19	0.07	0.01	0.02	0.91	0.12	0.0204	<0.0001	<0.0001
≥20	−2.33	0.56	−0.28	0.10	−1.32	0.47	0.0003	0.1671	0.0289
ALMI
5 to <7	0.20	0.08	0.16	0.03	0.21	0.13	0.6844	0.9316	0.7086
7 to <10	0.04	0.04	0.03	0.01	0.10	0.05	0.8534	0.3557	0.1994
10 to <14	0.03	0.03	−0.09	0.01	0.27	0.04	0.0001	<0.0001	<0.0001
14 to <20	−0.14	0.03	−0.11	0.01	0.08	0.03	0.3012	<0.0001	<0.0001
≥20	−0.72	0.20	−0.07	0.05	−0.22	0.13	0.0017	0.0361	0.2785

BMD, Becker muscular dystrophy; DMD, Duchenne muscular dystrophy; DMDI, Duchenne muscular dystrophy intermediate; SE, standard error.