The patients with sarcopenia were older than those without the condition (74.6 ± 6.5 vs. 70.5 ± 6.5 years, p = 0.001), and had a lower BMI (23.9 ± 3.4 vs. 26.7 ± 3.2 kg/m2, p < 0.001), preoperative total protein level (6.7 ± 0.4 vs. 7.1 ± 0.4 mg/dL, p < 0.001), preoperative Hb (12.3 ± 1.2 vs. 13.1 ± 1.8 g/dL, p = 0.008), SMI (5.5 ± 0.6 vs. 7.4 ± 1.1 kg/m2, p < 0.001) and PMV (6972.4 ± 1354.6 vs. 8418.4 ± 1634.8 cm3, p < 0.001). The gene discussed is GSTM1; the disease is sarcopenia.