TTR and lymphopenia: The mean OPNI of the control group was higher than that of the patients with disease type B3 (t = 2.247, P = 0.027), with preoperative lymphopenia (t = 5.880, P = 0.000), lower than normal haemoglobin (t = 4.984, P = 0.000), albumin (t = 11.178, P = 0.000), and prealbumin (t = 4.987, P = 0.000), and patients whose enteral nutritional intake was less than 500 kcal/day within 2 weeks preoperatively (t = 5.027, P = 0.000).