Table 2.

LMEM results, change in muscle fat fraction scores from baseline to follow-up. Separate models run for each leg compartment fat fraction score, where beta coefficient corresponds to time from baseline to follow-up

Muscle fat fraction score	Beta [95% CI]	P-value	Reference:
			Median [IQR] Score at baseline	IQR change in Score from baseline to follow-up
Muscle Fat Fraction Burden Index	0.35 [0.15, 0.54]	<.001	2.90 [1.54, 5.79]	[−0.12, 0.62]
DA leg compartment score	0.00 [−0.03, 0.04]	0.78	0.16 [0.09, 1.14]	[−0.06, 0.02]
DP leg compartment score	0.12 [0.01, 0.22]	0.026	1.00 [0.48, 2.74]	[−0.15, 0.20]
PA leg compartment score	0.12 [0.06, 0.18]	<.001	0.55 [0.34, 0.92]	[−0.03, 0.18]
PP leg compartment score	0.11 [0.04, 0.18]	0.001	0.76 [0.14, 1.45]	[−0.03, 0.10]