Mammographic texture resemblance generalizes as an independent risk factor for breast cancer

Breast Cancer Research

Table 4 Correlation of the percent density and mammographic texture resemblance (MTR) scores in the three training regimes on S2

		Percent density	MTR T1	MTR T2	MTR T3
Percent density	Rho	1.00	0.03	0.12	0.22
	P value		0.44	0.003	<0.0001
	N	665	665	665	665
MTR T1	Rho	0.03	1.00	0.98	0.88
	P value	0.44		<0.0001	<0.0001
	N	665	668	668	668
MTR T2	Rho	0.12	0.98	1.00	0.90
	P value	0.003	<0.0001		<0.0001
	N	665	668	668	668
MTR T3	Rho	0.22	0.88	0.90	1.00000
MTR T3	P value	<0.0001	<0.0001	<0.0001
	N	665	668	668	668

Numbers are given for training based on S1 (T1), S2 (T2), and S1 and S2 (T3) respectively. The latter two are performed in a leave-two-out fashion. Reported are the Pearson correlation coefficient Rho, the P values of being different from 0, and N, the numbers of observations on which the estimates are based.

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