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The Global and Regional Survival Rate of Women With Breast Cancer: A Systematic Review and Meta-analysis

  • Khadije Maajani
    Affiliations
    Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
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  • Arash Jalali
    Affiliations
    Department of Research, Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran
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  • Sadaf Alipour
    Affiliations
    Breast Disease Research Center, Tehran University of Medical Sciences, Tehran, Iran

    Department of Surgery, Arash Women’s Hospital, Tehran University of Medical Sciences, Tehran, Iran
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  • Mahmoud Khodadost
    Affiliations
    Department of Epidemiology, School of Public Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran

    Gerash University of Medical Sciences, Gerash, Iran
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  • Hamid Reza Tohidinik
    Affiliations
    HIV/STI Surveillance Research Center, and WHO Collaborating Center for HIV Surveillance, Institute for Futures Studies in Health, Kerman University of Medical Sciences, Kerman, Iran
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  • Kamran Yazdani
    Correspondence
    Address for correspondence: Kamran Yazdani, MD, PhD, Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
    Affiliations
    Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
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Published:January 28, 2019DOI:https://doi.org/10.1016/j.clbc.2019.01.006

      Abstract

      Breast cancer is the most common cancer among women in the world. The aim of this study was to measure the global and regional survival rates of women with breast cancer. We searched Medline/PubMed, Web of Science, Scopus, and Google Scholar to identify cohort studies on the survival rate of women with primary invasive breast cancer until the end of June 2017. We used random effect models to estimate the pooled 1-, 3-, 5-, and 10-year survival rates. Subgroup analysis and meta-regression models were used to investigate the potential sources of heterogeneity. One hundred twenty-six studies were included in the meta-analysis. Between-study heterogeneities in the 1-, 3-, 5-, and 10-year survival rates were significantly high (all I 2 s > 50%; P = .001). The global 1-, 3-, 5-, and 10-year pooled survival rates in women with breast cancer were 0.92 (95% confidence interval [CI], 0.90-0.94), 0.75 (95% CI, 0.71-0.79), 0.73 (95% CI, 0.71-0.75), and 0.61% (95% CI, 0.54-0.67), respectively. Subgroup analysis revealed that survival rates varied in different World Health Organization regions, age and stage at diagnosis, year of the studies, and degree of development of countries. Meta-regression indicated that year of the study (β = 0.07; P = .002) and development of country (β = −0.1; P = .0001) were potential sources of heterogeneity. The survival rate was improved in recent decades; however, it is lower in developing regions than developed ones.

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