Table 2.

Summary of texture feature characteristics in cancer-free and cancer-affected women

		Pre-Menopausal				Post-Menopausal
		Mean	Std. Dev.	CV	ICC	Mean	Std. Dev.	CV	ICC
Cancer-Free Population	Coarseness	4.139E-4	1.688E-4	0.40	0.68	4.498E-4	2.898E-4	0.43	0.66
	Contrast	3.528E2	107.05	0.31	0.87	3.443E2	89.459	0.26	0.77
	Gray level Correlation	9.655E-1	3.450E-2	0.03	0.39	9.658E-1	3.470E-2	0.03	0.71
	Energy	8.697E-5	3.054E-5	0.36	0.42	7.874E-5	3.327E-5	0.42	0.67
	Homogeneity	1.379E-1	1.370E-2	0.07	0.90	1.384E-1	1.280E-2	0.07	0.91
	Fractal Dimension *	2.556	0.251	0.10	0.71	2.669	0.163	0.06	0.65
	Skewness *	−1.882E-1	0.527	−2.79	0.52	−1.30E-2	0.559	−55.00	0.27
	MD (%) **	43.72	15.36	0.34	0.80	34.57	15.37	0.42	0.66
Cancer-Affected Population	Coarseness *	4.705E-4	1.617E-4	0.34	0.44	4.085E-4	1.754E-4	0.44	0.63
	Contrast	3.266E2	1.609E1	0.49	0.09	3.444E2	1.006E1	0.29	0.68
	Gray level Correlation *	9.751E-1	2.000E-2	0.02	0.35	9.574E-1	4.200E-2	0.043	0.80
	Energy	8.217E-5	3.370E-5	0.41	0.63	9.955E-5	5.575E-5	0.59	0.73
	Homogeneity	1.440E-1	1.340E-2	0.07	0.56	1.396E-1	1.220E-2	0.09	0.81
	Fractal Dimension*	2.658	0.210	0.08	0.59	2.591	0.176	0.07	0.62
	Skewness	−0.855E-1	1.166	−13.00	0.07	0.0934	0.492	5.56	0.31
	MD (%) **	44.61	14.96	0.33	0.76	33.36	14.09	0.46	0.73

MD: Mammographic density, Std. Dev: standard deviation, CV: coefficient of variation, ICC: intra-class correlation,

^*: p<0.05,

^**:p<0.001.

p-values are from t-test comparing differences in feature means between pre- and post-menopausal women