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Table 1 Selected characteristics of the 825 participants

From: Association between breast cancer susceptibility loci and mammographic density: the Multiethnic Cohort

Characteristic

Value

Ethnicity

 

   White

262 (31.8%)

   Japanese American

361 (43.8%)

   Native Hawaiian

202 (24.5%)

Menopausal status, hormone replacement therapy at first mammogram

 

   Premenopausal

201 (24.4%)

   Postmenopausal, no hormone replacement therapy

204 (24.7%)

   Estrogen only hormone replacement therapy

228 (27.6%)

   Estrogen and progestin hormone replacement therapy

192 (23.3%)

Case status

 

   Case

361 (43.8%)

   Control

464 (56.2%)

Family history (mother or sister)

 

   Yes

114 (13.8%)

   No

711 (86.2%)

Mean age over all mammograms (years)

59.5 ± 8.8

Mean body mass index over all mammograms (kg/m2)

25.3 ± 5.5

Mean percent dense area (%)

32.7 ± 22.2

Mean dense area (cm2)

32.5 ± 25.4

Mean breast area (cm2)

117.1 ± 60.0

  1. Data presented as n (%) or mean ± standard deviation. The set of 825 subjects is the union of the individual sets of 634 to 806 subjects who were genotyped for each polymorphism of interest; that is, 825 subjects had at least one polymorphism of interest genotyped.