Patterns of axillary lymph node @entity3 and XXXX in grade 1 @entity0 in a New Zealand cohort: Does ethnicity matter?

@entity1 @entity1137 @entity0 @entity66 @entity5 @entity3
BACKGROUND: In New Zealand, M  ori and Pacific @entity1 are more likely than New Zealand/European @entity1 to present at a younger age with larger @entity5 and @entity3 . Survival rates are also differential by ethnicity. Many factors are believed to be responsible for this including differences in comorbidities, delays to presentation and delays in treatment. It is unclear whether these differences exist amongst @entity1 with grade 1 @entity5 in New Zealand. Therefore, we examined patterns of axillary nodal involvement, @entity66 and mortality in grade 1 @entity0 in New Zealand @entity1 , and whether ethnicity was an important predictor for any of these outcomes. METHOD: Data was retrieved from the Auckland Breast Cancer Registry (ABCR) and the Waikato Breast Cancer Registry (WBCR) which are prospective, population-based databases. All @entity1 newly diagnosed with grade 1 primary @entity0 between 1 June 2000 and 31 May 2013 were identified from the two registries. RESULTS: There were 2857 grade 1 @entity0 diagnosed over this time period. Axillary lymph nodes were involved in 19.0% of @entity1 , and 5.1% developed @entity66 (locoregional or distant). Pacific and M  ori @entity1 were more likely than NZ European @entity1 to have larger @entity5 and @entity3 ( @entity3 ). Predictors for axillary node involvement were @entity5 size greater than 10mm, @entity3 and non-screen detected @entity5 . @entity5 size greater than 10mm, @entity1137 and BCS without radiotherapy were predictive of recurrent and or @entity3 . Ethnicity was not observed to be an independent predictor for axillary nodal involvement, recurrent and/or @entity3 , or @entity0 specific mortality amongst New Zealand @entity1 with grade 1 @entity0 . CONCLUSION: Ethnicity was not a predictor of axillary node involvement, @entity66 or mortality in grade 1 @entity0 in our population.
