Fig. 3From: Inflammation scores as prognostic biomarkers in small cell lung cancer: a systematic review and meta-analysisForrest plot of hazard ratio for the association between platelet-to-lymphocyte ratio and overall survival in patients with small cell lung cancer. N, number of included patients; CI, confidence interval; LD, limited disease; ED, extended disease. aPLR were evaluated in two individual subgroups: LD and EDBack to article page