Fig. 5From: Diagnostic role of circulating extracellular matrix-related proteins in non-small cell lung cancerSPARC levels are not associated to tumor stage or smoking history (packyears). a Box plots showing SPARC levels in different tumor stages (I-II vs III-IV), p = Wilcoxon test p-value. b Correlation between SPARC levels and lifetime smoke exposure (packyears), p = Spearman correlation p-valueBack to article page