The validity of the mortality to incidence ratio as a proxy for site-specific cancer survival

F Asadzadeh Vostakolaei, Henrike Kos, Maryska Heijnen, O (Otto) Visser, ALM Verbeek, LALM Kiemeney

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Background: The complement of the cancer mortality to incidence ratio [1 - (M/I)] has been suggested as a valid proxy for 5-year relative survival. Whether this suggestion holds true for all types of cancer has not yet been adequately evaluated. Methods: We used publicly available databases of cancer incidence, cancer mortality and relative survival to correlate relative survival estimates and 1 - (M/I) estimates from Denmark, Finland, Iceland, Norway, Sweden, the USA and the Netherlands. We visually examined for which tumour sites 5-year relative survival cannot simply be predicted by the 1 - (M/I) and evaluated similarities between countries. Results: Country-specific linear regression analyses show that there is no systematic bias in predicting 5-year relative survival by 1 - (M/I) in five countries. There is a small but significant systematic underestimation of survival from prognostically poor tumour sites in two countries. Furthermore, the 1 - (M/I) overestimates survival from oral cavity and liver cancer with > 10% in at least two of the seven countries. By contrast, the proxy underestimates survival from soft tissue, bone, breast, prostate and oesophageal cancer, multiple myeloma and leukaemia with > 10% in at least two of the seven countries. Conclusion: The 1 - (M/I) is a good approximation of the 5-year relative survival for most but not all tumour sites.
Original languageUndefined/Unknown
Pages (from-to)573-577
Number of pages5
JournalEuropean Journal of Public Health
Issue number5
Publication statusPublished - 2011

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