Similarity of Fibroglandular Breast Tissue Content Measured from Magnetic Resonance and Mammographic Images and by a Mathematical Algorithm

Table 1

General characteristics of the study subjects (𝑛=137).

	𝑛 (%, column)
Race/ethnicity
White	74 (54%)
Hispanic	41 (30%)
Black	22 (16%)
	Mean (95% CI)
Demographics and anthropometrics
Age, y	35.9 (35.4, 36.4)
Weight, kg	74.8 (72.3, 77.4)
Height, cm	161.6 (160.4, 162.7)
BMI, kg/m^2	28.7 (27.8, 29.7)
Fat body mass, kg	28.2 (26.5, 29.9)
Lean body mass, kg	46.9 (45.8, 48.0)
Waist circumference, cm	87.3 (85.3, 89.4)
Hip circumference, cm	109.7 (107.7, 111.8)
Reproductive history
Age at menarche, y	12.5 (12.2, 12.8)
Age at first birth, y	23.3 (22.5, 24.2)
Years since last pregnancy	7.3 (6.4, 8.1)
Pregnancy, completed
Zero	18 (13.1%)
One	17 (12.4%)
Two	44 (32.1%)
Three and more	58 (42.3%)
Blood chemistry and hormones
Triglycerides, mg/dL	110.2 (97.4, 123)
Cholesterol, mg/dL	178.6 (173.7, 183.6)
HDL, mg/dL	53.1 (51, 55.2)
Alkaline phosphatase (ALP), U/L	70.6 (67.6, 73.7)
Alanine aminotransferase (ALT), U/L	26.9 (25.2, 28.6)
Aspartate aminotransferase (AST), U/L	21.1 (19.9, 22.3)
Sex hormone binding globulin (SHBG), nmol/L	101.9 (94.9, 108.9)
C-reactive protein (CRP), mg/L	6.8 (5.5, 8.1)
Insulin, 𝜇IU/mL	12.6 (11, 14.2)
Insulin-like growth factor I (IGF-I), ng/mL	291.6 (272.4, 310.7)
Insulin-like growth factor II (IGF-II), ng/mL	865.1 (824.7, 905.5)
17𝛽-Estradiol, pg/mL	132.2 (125.6, 138.9)
Progesterone, ng/mL	10.1 (9.2, 10.9)