S Haghighat1, M E Akbari, S Ghaffari, P Yavari. 1. Epidemiology Department, School of Public Health, Shahid Beheshti University of Medical Sciences (SBMU), Tehran, Iran.
Abstract
INTRODUCTION: Breast cancer is the most common cancer in women. Improvements of early diagnosis modalities have led to longer survival rates. This study aimed to determine the 5, 10 and 15 year mortality rates of breast cancer patients compared to the normal female population. MATERIALS AND METHODS: The follow up data of a cohort of 615 breast cancer patients referred to Iranian Breast Cancer Research Center (BCRC) from 1986 to 1996 was considered as reference breast cancer dataset. The dataset was divided into 5 year age groups and the 5, 10 and 15 year probability of death for each group was estimated. The annual mortality rate of Iranian women was obtained from the Death Registry system. Standardized mortality ratios (SMRs) of breast cancer patients were calculated using the ratio of the mortality rate in breast cancer patients over the general female population. RESULTS: The mean age of breast cancer patients at diagnosis time was 45.9 (±10.5) years ranging from 24-74. A total of 73, 32 and 2 deaths were recorded at 5, 10 and 15 years, respectively, after diagnosis. The SMRs for breast cancer patients at 5, 10 and 15 year intervals after diagnosis were 6.74 (95% CI, 5.5- 8.2), 6.55 (95%CI, 5-8.1) and 1.26 (95%CI, 0.65-2.9), respectively. CONCLUSION: Results showed that the observed mortality rate of breast cancer patients after 15 years from diagnosis was very similar to expected rates in general female population. This finding would be useful for clinicians and health policy makers to adopt a beneficial strategy to improve breast cancer survival. Further follow-up time with larger sample size and a pooled analysis of survival rates of different centres may shed more light on mortality patterns of breast cancer.
INTRODUCTION:Breast cancer is the most common cancer in women. Improvements of early diagnosis modalities have led to longer survival rates. This study aimed to determine the 5, 10 and 15 year mortality rates of breast cancerpatients compared to the normal female population. MATERIALS AND METHODS: The follow up data of a cohort of 615 breast cancerpatients referred to Iranian Breast Cancer Research Center (BCRC) from 1986 to 1996 was considered as reference breast cancer dataset. The dataset was divided into 5 year age groups and the 5, 10 and 15 year probability of death for each group was estimated. The annual mortality rate of Iranian women was obtained from the Death Registry system. Standardized mortality ratios (SMRs) of breast cancerpatients were calculated using the ratio of the mortality rate in breast cancerpatients over the general female population. RESULTS: The mean age of breast cancerpatients at diagnosis time was 45.9 (±10.5) years ranging from 24-74. A total of 73, 32 and 2 deaths were recorded at 5, 10 and 15 years, respectively, after diagnosis. The SMRs for breast cancerpatients at 5, 10 and 15 year intervals after diagnosis were 6.74 (95% CI, 5.5- 8.2), 6.55 (95%CI, 5-8.1) and 1.26 (95%CI, 0.65-2.9), respectively. CONCLUSION: Results showed that the observed mortality rate of breast cancerpatients after 15 years from diagnosis was very similar to expected rates in general female population. This finding would be useful for clinicians and health policy makers to adopt a beneficial strategy to improve breast cancer survival. Further follow-up time with larger sample size and a pooled analysis of survival rates of different centres may shed more light on mortality patterns of breast cancer.
Authors: Mohammad Esmaeil Akbari; Soheila Sayad; Saed Sayad; Maryam Khayamzadeh; Leila Shojaee; Zeynab Shormeji; Mojtaba Amiri Journal: Int J Breast Cancer Date: 2017-11-01
Authors: Roya Dolatkhah; Mohammad Hossein Somi; Mohammad Asghari Jafarabadi; Mehrnaz Hosseinalifam; Sepideh Sepahi; Mina Belalzadeh; Marzieh Nezamdoust; Saeed Dastgiri Journal: Int J Breast Cancer Date: 2020-05-01