Risk factors at five-year survival in grade 3 breast cancer: a retrospective observational study of the New Zealand population

BMC Public Health

Robert Borotkanics¹  Reena Ramsaroop²  Fabrice Merien³  Sharita Meharry³ 

[1] Faculty of Health and Environmental Sciences, Auckland University of Technology, Auckland, NZ, New Zealand;North Shore Hospital, Waitemata District Health Board, Surgical Pathology Unit, Auckland, NZ, New Zealand;School of Sciences, Faculty of Health and Environmental Sciences, Auckland University of Technology, Private Bag 92006, 1142, Auckland, New Zealand;

关键词: Grade 3;    Breast cancer;    Prognostic factors;    Survival;   

DOI  :  10.1186/s12889-021-12122-8

来源: Springer

【 摘 要 】

BackgroundBreast cancer is the most common cancer in New Zealand, with approximately 3000 new registrations annually, affecting one in nine women and resulting in more than 600 deaths. This study analyzed data of patients with selected prognostic factors of Nottingham grade 3 tumors over a specified five-year period. The study aimed to identify factors that result in differential survival in the female, New Zealand population.MethodThis is an observational, retrospective cohort study of prospectively collected data from New Zealand Breast Cancer Register. The selected period of 1st January 2011 to 31st, December 2015 allowed a consistent overlap for a national five-year data of grade 3 breast cancer in New Zealand. Mortality was carried out using univariate Fine-Gray competing risk statistical models.ResultsThis study showed that women in the older age group (> 70 years) had higher five-year mortality risk (HR: 1.7, 95% CI: 0.9–3.0, p = 0.053). Hormonal receptor analysis showed that ER positive, PR negative, and ER negative, PR negative subjects were at increased risk (HR = 3.5, 95% CI 2.3–5.4, p < 0.001) and (HR = 2.6, 95% CI, 1.8–3.9, p < 0.001) respectively. Molecular subtypes Triple Negative Breast Cancer and Luminal B subjects were at increased risk (HR = 3.0, 95% CI, 1.8–4.7, p < 0.001 and (HR = 3.3, 95% CI, 1.7–6.3, p < 0.001) respectively. HER2 enriched subjects were at a higher, but not significant, risk of five-year mortality compared to luminal A (HR = 1.6, 95% CI, 0.8–3.0, p = 0.10). NZ Europeans were at increased risk (HR = 1.7, 95% CI, 0.8–3.2, p = 0.11), with the highest Cumulative Incidence Function CIF, the largest proportion of HER2 enriched and TNBC across ethnicities.; however, Pacific Islanders experienced the highest HER2 CIF.ConclusionThe survival rates for grade 3 breast cancer vary across the selected prognostic factors and ethnicity. The results of this study make an initial contribution to the understanding of grade 3 breast cancer in the New Zealand population.

【 授权许可】

CC BY