“…According to statistics, the incidence of malnutrition in hospitalized patients with lung cancer is about 20-50% (Andrews Wright & Goss, 2019;Arroyo et al, 2019). At present, radical surgery can effectively remove the lesion, and it is still an effective method to treat early and middle lung cancer and prolong the survival time of patients (Lee et al, 2019;Lu et al, 2020;Shi et al, 2019). However, patients with lung cancer have poor nutrition status and weakened immune function before surgery (Park et al, 2020;Ulmann et al, 2019).…”