Ethnic and socioeconomic trends in breast cancer incidence in New Zealand.
Ruth Cunningham, Caroline Shaw, Tony Blakely, June Atkinson, Diana Sarfati
BMC Cancer | Published : 2010
BACKGROUND: Breast cancer incidence varies between social groups, but differences have not been thoroughly examined in New Zealand. The objectives of this study are to determine whether trends in breast cancer incidence varied by ethnicity and socioeconomic position between 1981 and 2004 in New Zealand, and to assess possible risk factor explanations. METHODS: Five cohorts of the entire New Zealand population for 1981-86, 1986-1991, 1991-1996, 1996-2001, and 2001-2004 were created, and probabilistically linked to cancer registry records, allowing direct determination of ethnic and socioeconomic trends in breast cancer incidence. RESULTS: Breast cancer rates increased across all ethnic and so..View full abstract