Table 1 Characteristics of participants by study in the AMBER consortium

From: Genetic variation in the insulin, insulin-like growth factor, growth hormone, and leptin pathways in relation to breast cancer in African-American women: the AMBER consortium

 

Study

 

BWHS

CBCS

WCHS

MEC

AMBER a

Controls

2,249

615

834

989

4,687

Cases

901

1408

821

533

3,663

 ER+ cases

498

741

435

309

1,983

 ER− cases

233

565

165

135

1,098

 Unknown ER

170

102

221

89

582

Age at diagnosis

 <40

47

204

85

0

336

 40–49

262

459

215

9

945

 50–59

302

381

292

112

1,087

 60–69

204

267

173

175

819

 ⩾70

86

97

56

237

476

  1. Abbreviations: AMBER, African American Breast Cancer Epidemiology and Risk; BWHS, Black Women’s Health Study; CBCS, Carolina Breast Cancer Study; ER, estrogen receptor; MEC, Multi-Ethnic Cohort; WCHS, Women’s Circle of Health Study.
  2. a AMBER includes all four studies: BWHS, CBCS, WCHS, and MEC.
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