Table 3.

Correlations between solid type of histology and clinical stage. Spearman’s rank correlation coefficient was adopted for analyzing correlation between histology and clinical stage

Variable1	Variable2	Correlation coefficient	p value	Significance level
Clinical stage (I,II/ III,IV)	Histology (C-T/Solid)	0.354	0.010*	1%
T classification (T1,2/T3,4)	Histology (C-T/Solid)	0.376	0.006**	1%
N classification (N0/N1,2)	Histology (C-T/Solid)	0.421	0.002**	1%
M classification (M0/M1)	Histology (C-T/Solid)	0.281	0.044*	5%

** represents significance at p < 0.01, and * at p < 0.05 level