SMN1 and sarcopenia: Patients with sarcopenia (n = 42) naturally presented with lower SMA (117.85 vs. 156.31 cm2; p < 0.001) and PMA (12.56 vs. 18.42 cm2; p < 0.001), but also had significantly smaller SAT (193.23 vs. 251.04 cm2; p = 0.024) and VAT (137.64 vs. 190.73; p = 0.019). Sarcopenic patients experienced significantly lower total PMA loss of 40.23% vs. 53.97% in non-sarcopenic patients (p < 0.001), while the loss rate per day (0.98% vs. 1.02%) did not differ significantly (p = 0.59).