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Table 1.

Association between breast cancer status and number of mammograms before diagnosis (affected within 1 year of enrollment) or questionnaire (unaffected)

GeneAffected carriers (n)Unaffected carriers (n)OR (95% CI)*P
BRCA1 and BRCA2 combined 34 128 0.94 (0.88-1.00) 0.06 
BRCA1 17 69 0.99 (0.90-1.10) 0.84 
BRCA2 17 59 0.91 (0.83-1.00) 0.06 
GeneAffected carriers (n)Unaffected carriers (n)OR (95% CI)*P
BRCA1 and BRCA2 combined 34 128 0.94 (0.88-1.00) 0.06 
BRCA1 17 69 0.99 (0.90-1.10) 0.84 
BRCA2 17 59 0.91 (0.83-1.00) 0.06 
*

OR adjusted for age at diagnosis (affected) or questionnaire (unaffected).

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