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http://dx.doi.org/10.7314/APJCP.2015.16.14.5853

Relative Survival of Breast Cancer Patients in Iran  

Kasaeian, Amir (Non-Communicable Diseases Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences)
Mosavi-Jarrahi, Alireza (Department Social Medicine, Shahid Beheshti University of Medical Sciences)
Abadi, Alireza (Department of Community and Health, School of Medicine, Shahid Beheshti University of Medical Sciences)
Mahmoodi, Mahmood (Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences)
Mehrabi, Yadollah (Department of Epidemiology, School of Public Health, Shahid Beheshti University of Medical Sciences)
Mohammad, Kazem (Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences)
Eshraghian, Mohammad Reza (Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences)
Zare, Ali (Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences)
Publication Information
Asian Pacific Journal of Cancer Prevention / v.16, no.14, 2015 , pp. 5853-5858 More about this Journal
Abstract
Background: The survival rate reflecting prognosis of breast cancer patients is usually estimated based on crude survival methods such as observed and cause-specific. In situations where data are based on population-cancer registries, this method may produce biased estimations. This study therefore aimed to estimate the net survival of breast cancer based on relative survival. Materials and Methods: Data for 622 breast cancer patients diagnosed at the Iran Cancer Institute during 1990-95 and tracked till the end of 2000 were analyzed. For estimation of relative survival, Ederer's second method and SAS (9.1) and STATA (11) software were used. Results: Threeyear relative survivals of 85%, 90%, 80% and 67% were observed for age groups 15-44, 55-59, 60-74, and 75+years-old, respectively. A relative survival of approximately one was observed for two subsequent years for age-group 45-59 years-old. A value greater than one for two subsequent years of follow-up was observed in the age-group 60-74 years-old. Conclusions: Tracking the diagnosis of breast cancer, the relative survival decreases as we go to higher age-groups. It is also perceived that through follow-up, relative survival first decreased and then increased a little. The statistical cure point is acceptable for age group 45-59 years-old while for age-groups 15-44 and 60-74 years old is a sign of low quality data for some follow-up intervals.
Keywords
Breast cancer; cause-specific survival; net survival; relative survival; cause-specific survival;
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