CRP and lung cancer: Correlation analysis showed that C-reactive protein/albumin ratio was negatively correlated with advanced lung cancer inflammation index (r=-0.433, p<0.001) and positively correlated with the other four indices (neutrophil/lymphocyte ratio: r=0.368, p<0.001; platelet/lymphocyte ratio: r=0.321, p<0.001; Glasgow Prognostic Score: r=0.537, p<0.001; and prognostic nutritional index: r=0.223, p=0.003).