Degree Name

BS in Statistics


Statistics Department


Rebecca Ottesen


The main focus of this paper was to evaluate possible demographic and clinical characteristics associated with a woman’s choice of breast conserving surgery (BCS), unilateral mastectomy (ULM), or bilateral risk reduction mastectomy (BRRM). The cohort consisted of patients presenting to the City of Hope National Medical Center with ductal carcinoma in situ breast cancer who elected to have cancer directed surgery (N=305). Analyses to examine associations of patient characteristics with type of surgery were conducted using a multinomial logistic regression. Results showed that older women were more likely to choose breast conserving surgery over bilateral risk reduction mastectomy than younger women (OR=6.64, 95% CI=2.02-­‐21.84). Women diagnosed between 1997 and 2004 were more likely to choose BCS over BRRM than patients more recently (2005-­‐2012), (OR=3.91, 95% CI=1.48-­‐10.33). Women with small tumors (