Table 4.

Linear regression model for delta muscle-to-fat ratio z-scores.

	Beta	Standard error	p
Constant	−0.322	0.104	0.002
SEP index	0.116	0.054	0.033
BMI z-score pre-COVID-19	−0.139	0.030	<0.001
MFR z-score pre-COVID-19	−0.276	0.044	<0.001
Physical activity during COVID-19	0.173	0.086	0.045

SEP, socioeconomic position; BMI, body mass index; MFR, muscle-to-fat ratio.