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Table 1 Descriptive characteristics of the studies included

From: Identification of two novel mammographic density loci at 6Q25.1

Study

Number

Mammogram

Measure

Age (years)

BMI (kg/m2)

Post-menopause

Percent density (%)a

Absolute densea

Absolute nondensea

    

Mean (SD)

Mean (SD)

Percent (N)

Median (IQR)

Median (IQR)

Median (IQR)

KARMA

4025

Raw digital

Volpara

53.6 (9.4)

25.3 (4.2)

51.0 (2,054)

8.4 (6.5)

60.4 (36.8)

677 (581)

SASBAC

1589

Digitized screen-film

Cumulus

62.4 (6.4)

25.6 (3.8)

100 (1,589)

11.8 (17.7)

18.1 (26.2)

140 (76)

LIBRO-1

2805

Digitized screen-film

ImageJ

58.4 (8.8)

25.3 (4.0)

76.1 (2,134)

30.0 (21.6)

30.6 (21.5)

71 (30)

  1. All mammograms were from the mediolateral oblique (MLO) view
  2. BMI body mass index, SD standard deviation, IQR interquartile range
  3. aPercent density (percent MD) in %; absolute dense tissue (absolute MD) in cm3 (KARMA) and cm2 (SASBAC and LIBRO-1); absolute nondense tissue in cm3 (KARMA) and cm2 (SASBAC and LIBRO-1)