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  • Vitamin E intake from natur...
    Edefonti, V; Hashibe, M; Parpinel, M; Ferraroni, M; Turati, F; Serraino, D; Matsuo, K; Olshan, A F; Zevallos, J P; Winn, D M; Moysich, K; Zhang, Z-F; Morgenstern, H; Levi, F; Kelsey, K; McClean, M; Bosetti, C; Schantz, S; Yu, G-P; Boffetta, P; Chuang, S-C; A Lee, Y-C; La Vecchia, C; Decarli, A

    British journal of cancer, 06/2015, Letnik: 113, Številka: 1
    Journal Article

    Evidence for the possible effect of vitamin E on head and neck cancers (HNCs) is limited. We used individual-level pooled data from 10 case-control studies (5959 cases and 12 248 controls) participating in the International Head and Neck Cancer Epidemiology (INHANCE) consortium to assess the association between vitamin E intake from natural sources and cancer of the oral cavity/pharynx and larynx. Adjusted odds ratios (ORs) and 95% confidence intervals (CIs) were estimated using unconditional logistic regression models applied to quintile categories of non-alcohol energy-adjusted vitamin E intake. Intake of vitamin E was inversely related to oral/pharyngeal cancer (OR for the fifth vs the first quintile category=0.59, 95% CI: 0.49-0.71; P for trend <0.001) and to laryngeal cancer (OR=0.67, 95% CI: 0.54-0.83, P for trend <0.001). There was, however, appreciable heterogeneity of the estimated effect across studies for oral/pharyngeal cancer. Inverse associations were generally observed for the anatomical subsites of oral and pharyngeal cancer and within covariate strata for both sites. Our findings suggest that greater vitamin E intake from foods may lower HNC risk, although we were not able to explain the heterogeneity observed across studies or rule out certain sources of bias.