Table 2.

Rate of change of appendicular lean mass (kg) and appendicular lean mass index (kg/m²) in four age groups of mutations health controls (HC) and patients with BMD and DMD.

	Healthy controls		BMD		DMD		P‐values
	N = 693		N = 46		N = 499
Age (years)	Estimate	SE	Estimate	SE	Estimate	SE	HC vs. BMD	HC vs. DMD	BMD vs. DMD
ALM
5 to <7	1.25	0.14	1.08	0.46	0.67	0.06	0.7149	0.0002	0.3820
7 to <10	0.69	0.05	0.70	0.19	0.43	0.03	0.9380	<0.00001	0.1446
10 to <14	2.48	0.03	1.86	0.13	0.31	0.02	<0.00001	<0.00001	<0.00001
14 to <20	1.15	0.02	0.91	0.12	0.04	0.02	0.0620	<0.00001	<0.00001
≥20	−0.37	0.09	−1.32	0.47	−0.39	0.10	0.0443	0.8962	0.0493
ALMI
5 to <7	0.30	0.03	0.21	0.13	0.17	0.03	0.4918	0.0033	0.7532
7 to <10	0.16	0.01	0.10	0.05	0.03	0.01	0.2331	<0.00001	0.1942
10 to <14	0.44	0.01	0.27	0.04	−0.08	0.01	<0.00001	<0.00001	<0.00001
14 to <20	0.21	0.01	0.08	0.03	−0.12	0.01	0.0002	<0.00001	<0.00001
≥20	0.00	0.02	−0.22	0.13	−0.10	0.05	0.1017	0.0650	0.3774

BMD, Becker muscular dystrophy; DMD, Duchenne muscular dystrophy; HC, healthy controls; SE, standard error.