Mammographic Density and the Risk of Tumor Recurrence in Asian Women: a Case-control Study

Inclusion Criteria: * Women diagnosed with invasive breast cancer between 2004 and 2009 who had undergone surgery and had the mammographic breast density ascertained before, or at, diagnosis. Exclusion Criteria: * Women diagnosed with invasive breast cancer between 2004 and 2009 who had not undergone surgery or who had no mammographic breast density ascertained before, or at, diagnosis.