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Table 1 Recruitment of families for linkage

From: A genome-wide linkage study of mammographic density, a risk factor for breast cancer

Study name Families, n (%) Women with complete data for analysis, n (%)
All Families 1,415 (100) 3,253 (100)
Australian site of the BCFR 70 (5.0) 174 (5.4)
Australian Twin & Sister Study 589 (41.6) 1,363 (41.9)
Northern California site of the BCFR 257 (18.2) 579 (17.8)
Ontario site of the BCFR 246 (17.4) 561 (17.3)
Ontario families from other sources 253 (17.9) 576 (17.7)
  1. BCFR, Breast Cancer Family Registry.