The correlation between skeletal muscle index and anxiety in patients with lung cancer on the first day of chemotherapy.

Aim: To evaluate the relationship between anxiety and skeletal muscle index (SMI) levels in lung cancer patients on the first day of chemotherapy. Materials & methods: This cross-sectional study included 108 patients. We analyzed patient characteristics, SMI levels, pain status and predicted anxiety factors. Results: Anxiety was detected in 61% of patients. SMI levels were significantly lower in the high anxiety group than the low anxiety group (p < 0.001). A significant correlation was observed between anxiety and SMI levels (r = -0.292; p = 0.002). Anxiety levels were significantly correlated with trait anxiety (r = 0.618; p < 0.001) and visual analog scale-pain (r = 0.364; p < 0.001). SMI (odds ratio: 0.94), trait anxiety (odds ratio: 1.12) and visual analog scale pain (odds ratio: 1.28) were independent risk factors for anxiety after adjusting for sex, stage and Eastern Cooperative Oncology Group performance status. Conclusion: Our study highlighted that higher anxiety scores were significantly correlated with lower SMI levels. We found that SMI, pain and trait anxiety were independent risk factors for anxiety.