Age effects on survival from early breast cancer in clinical settings in Australia

David Roder, Primali de Silva, Helen Zorbas, Jim Kollias, Peter Malycha, Chris Pyke, Ian Campbell

    Research output: Contribution to journalArticle

    10 Citations (Scopus)

    Abstract

    Background: The study aim was to determine whether age is an independent risk factor for survival from early invasive breast cancer in contemporary Australian clinical settings. Methods: The study included 31493 breast cancers diagnosed in 1998-2005. Risk of death from breast cancer was compared by age, without and with adjustment for clinical risk factors, using Cox proportional hazard regression. Results: Risk of breast cancer death was elevated for cancers of larger size, higher grade, positive nodal status, oestrogen receptor negative status, vascular invasion and multiple foci. Ductal lesions presented a higher risk than other lesions. Adjusting for these factors, the relative risk of breast cancer death (95% confidence limits) was lower for 40-49-year-olds at 0.80 (0.66, 0.96) than for the reference category under 40 years, but higher for 70-79-year-olds at 1.64 (1.36, 1.98) and women aged 80 years or more at 2.19 (1.79, 2.69). The risk for 50-69-year-olds and women under 40 years was similar. Risk-factor adjustment reduced the difference in risk between the reference category under 40 years and 40-49-year-olds, largely eliminated the lower relative risk for 50-69-year-olds, and increased the relative risks for women aged 70-79 years and older. Discussion: Survivals in women under 40 and over 70 years of age are poorer than for 40-69-year-olds. Research is needed into the best treatment modalities for younger women and older women with co-morbidity.

    Original languageEnglish
    Pages (from-to)524-528
    Number of pages5
    JournalANZ Journal of Surgery
    Volume82
    Issue number7-8
    DOIs
    Publication statusPublished - Jul 2012

    Keywords

    • Age
    • Breast cancer survival
    • Risk factors.

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