Table 3.

Correlation of Kyn, Trp and Kyn/Trp ratio with the continuous variables age, ER, PgR, Ki67 and size

	Kyn			Trp			Ratio
	Correlation coefficient	95% CI	p value	Correlation coefficient	95% CI	p value	Correlation coefficient	95% CI	p value
Age (years)	0.295	0.196 to 0.389	< 0.0001***	0.028	− 0.078 to 0.133‏	0.610	0.300	0.200 to 0.393	< 0.0001***
ER (%)	0.010	− 0.129 to 0.148	0.890	0.146	0.008 to 0.279	0.039*	− 0.103	− 0.239 to 0.036	0.145
PgR (%)	− 0.074	− 0.211 to 0.065	0.297	0.116	− 0.023 to 0.250	0.103	− 0.184	− 0.315 to − 0.046	0.009**
Ki67 (%)	− 0.036	− 0.173 to 0.103	0.614	− 0.108	− 0.243 to 0.031	0.128	0.045	− 0.94 to 0.183	0.523
Size (mm)	0.003	− 0.137 to 0.142	0.968	− 0.170	− 0.302 to − 0.031	0.017*	0.119	− 0.021 to 0.254	0.096

The correlation was calculated with the Spearman test. The correlation coefficient, 95% CI and p value are reported in the table. The significant correlations are reported in italics

CI confidence interval, ER estrogen receptor, PgR progesterone receptor