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  • Title: The relationship between survival and socio-economic status for head and neck cancer in Canada.
    Author: McDonald JT, Johnson-Obaseki S, Hwang E, Connell C, Corsten M.
    Journal: J Otolaryngol Head Neck Surg; 2014 Jan 14; 43(1):2. PubMed ID: 24422754.
    Abstract:
    BACKGROUND: Human papilloma virus (HPV) is emerging as the primary cause for some head and neck cancers. The objective of this study was to investigate the association between head and neck cancer (HNC) survival and socioeconomic status (SES) in Canada, and to investigate changes in the relationship between HNC survival and SES from 1992 to 2005. METHODS: Cases were drawn from the Canadian Cancer Registry (1992-2005), and were categorized into three subsites: oropharynx, oral cavity, and "other" (hypopharynx, larynx, and nasopharynx). Demographic and socioeconomic information were extracted from the Canadian Census of Population data for the study period, which included three census years: 1991, 1996 and 2001. We linked cases to income quintiles (InQs) according to patients' postal codes. RESULTS: Overall survival, without controlling for smoking, for oropharyngeal cancer increased dramatically from 1992-2005 in Canada. This increase in survival for oropharynx cancer was eliminated by the introduction of controls for smoking. Survival for all head and neck cancer subsites was strongly correlated with SES, as measured by income quintile, with lower InQ's having lower survival than higher. Lastly, the magnitude of the difference in survival between the highest and lowest income quintiles increased significantly over the time period studied for oropharynx cancer, but did not statistically significantly change for oral cavity cancer or other head and neck cancers. CONCLUSIONS: These data confirm a significant impact of socioeconomic deprivation on overall survival for head and neck cancers in Canada, and may provide indirect evidence that HPV-positive head and neck cancers are more common in higher socioeconomic groups.
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