Table 2.
Demographics of Breast Conserving Surgery among Women Diagnosed with Ductal Carcinoma in situ, National Cancer Data Base, 1998–2011
| Variable | Mastectomy (N= 131,309) Row % |
BCS (N= 284,923) Row % |
ORa (95% CI) |
|---|---|---|---|
| Age group, y | |||
| <45 | 43.5 | 56.5 | 1 |
| 45–54 | 32.9 | 67.1 | 1.60 (1.54–1.65) |
| 55–64 | 29.2 | 70.8 | 1.92 (1.85–1.99) |
| 65–74 | 28.4 | 71.6 | 2.14 (2.05–2.23) |
| ≥75 | 28.6 | 71.4 | 2.11 (2.02–2.21) |
| Year of diagnosis | |||
| 1998–1999 | 33.4 | 66.6 | 1 |
| 2000–2001 | 31.9 | 68.1 | 1.12 (1.08–1.16) |
| 2002–2003 | 29.9 | 70.1 | 1.21 (1.15–1.26) |
| 2004–2005 | 29.3 | 70.7 | 1.21 (1.13–1.29) |
| 2006–2007 | 30.2 | 69.8 | 1.23 (1.16–1.31) |
| 2008–2009 | 32.8 | 67.2 | 1.12 (1.05–1.19) |
| 2010–2011 | 33.1 | 66.9 | 1.12 (1.05–1.20) |
| Ancestry/ethnicity | |||
| Non-Hispanic, European | 31.4 | 68.6 | 1 |
| Non-Hispanic, African | 32.2 | 67.8 | 1.05 (1.01–1.08) |
| Hispanic | 31.6 | 68.4 | 1.14 (1.08–1.21) |
| Other | 32.3 | 67.7 | 1.00 (0.94–1.06) |
| Geographic region | |||
| Northeast | 25.9 | 74.1 | 1 |
| Midwest | 31.7 | 68.3 | 0.75 (0.73–0.77) |
| South | 35.2 | 64.8 | 0.64 (0.62–0.66) |
| West | 32.4 | 67.6 | 0.70 (0.68–0.73) |
a
Adjusted for comorbidity index, health insurance, facility type, DCIS patient volume, tumor size and grade
Test of interaction between year of diagnosis and ancestry/ethnicity: X2=42.70, df=18, P< 0.01