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Table 1.

Characteristics of cases of invasive breast cancer and controls in the CBCS stratified by race

VariableCasesControls
African-Americans N = 654 N = 605 
    Age at diagnosis (cases) or selection (controls)   
        Mean 51.1 51.8 
        Median 49.5 50.0 
        Range 23-74 26-74 
    Menopausal status   
        Premenopausal 293 (45%) 275 (45%) 
        Postmenopausal 361 (55%) 330 (55%) 
    Breast cancer in first-degree relative   
        Yes 99 (16%) 65 (11%) 
        No 536 (84%) 512 (89%) 
    AJCC stage at diagnosis (cases)   
        I 216 (35%)  
        II 302 (49%)  
        III 72 (12%)  
        IV 27 (4%)  
   
Whites N = 879 N = 760 
    Age at diagnosis (cases) or selection (controls)   
        Mean 50.9 52.2 
        Median 48.0 49.0 
        Range 24-74 21-74 
    Menopausal status   
        Premenopausal 447 (51%) 351 (46%) 
        Postmenopausal 432 (49%) 409 (54%) 
    Breast cancer in first-degree relative   
        Yes 149 (17%) 100 (14%) 
        No 708 (83%) 640 (86%) 
    AJCC stage at diagnosis (cases)   
        I 393 (48%)  
        II 349 (42%)  
        III 69 (8%)  
        IV 16 (2%)  
VariableCasesControls
African-Americans N = 654 N = 605 
    Age at diagnosis (cases) or selection (controls)   
        Mean 51.1 51.8 
        Median 49.5 50.0 
        Range 23-74 26-74 
    Menopausal status   
        Premenopausal 293 (45%) 275 (45%) 
        Postmenopausal 361 (55%) 330 (55%) 
    Breast cancer in first-degree relative   
        Yes 99 (16%) 65 (11%) 
        No 536 (84%) 512 (89%) 
    AJCC stage at diagnosis (cases)   
        I 216 (35%)  
        II 302 (49%)  
        III 72 (12%)  
        IV 27 (4%)  
   
Whites N = 879 N = 760 
    Age at diagnosis (cases) or selection (controls)   
        Mean 50.9 52.2 
        Median 48.0 49.0 
        Range 24-74 21-74 
    Menopausal status   
        Premenopausal 447 (51%) 351 (46%) 
        Postmenopausal 432 (49%) 409 (54%) 
    Breast cancer in first-degree relative   
        Yes 149 (17%) 100 (14%) 
        No 708 (83%) 640 (86%) 
    AJCC stage at diagnosis (cases)   
        I 393 (48%)  
        II 349 (42%)  
        III 69 (8%)  
        IV 16 (2%)  
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