The underlying areas used are Statistical Areas Level 2 (SA2s). These maps of excess hazard ratios (EHRs) represent the risk of dying from breast cancer within 5 years in comparison to: 1) the Queensland average in 1997-2004 (for both 1997-2004 and 2005- 2012) and 2) in comparison to each individual SA2 (“Changes over time”), so 1 = the same EHR in that SA2 during 1997–2004. SA2s aim to represent a community that interacts together socially and economically; there are 526 SA2s covering all of Queensland without gaps or overlaps.