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Dietary factors and thyroid cancer risk: a meta-analysis of observational studies.

Abstract

To better understand the relationship between dietary factors and thyroid cancer risk, we summarized the published evidence on relationship between dietary factors and thyroid cancer incidence. Searching several databases for relevant studies published by March 2014 included a total of 19 studies. We calculated summary odds ratios (ORs) for each risk factor. Based on the highest level of total consumption vs. the lowest level, the summary OR [95% (confidence interval) CI] of thyroid cancer was 0.79 (0.66, 0.94) for fish; 0.95 (0.74, 1.23) for salt water fish; 0.86 (0.63, 1.16) for fresh water fish; 0.76 (0.58, 1.00) for vegetables; 0.88 (0.72, 1.08) for shellfish; 0.93 (0.66, 1.29) for cruciferous vegetables; 0.97 (0.78, 1.21) for fruits; 0.96 (0.70, 1.34) for meat; and 1.11 (0.86, 1.42) for grains. Subgroup analysis showed that fish (OR 0.74, 95%CI: 0.59, 0.92) and shellfish (OR 0.46, 95%CI: 0.27, 0.75) consumption have a protective effect in iodine deficiency areas, whereas the ORs were not statistically significant in iodine-rich areas. Our findings indicated that fish and shellfish consumption may decrease the risk of thyroid cancer in iodine deficiency areas, although no such effect was observed in iodine-rich areas.

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  • Publisher Full Text
  • Authors+Show Affiliations

    ,

    a Department of Medical Statistics and Epidemiology, School of Public Health , Sun Yat-sen University , Guangzhou , PR China.

    Source

    Nutrition and cancer 66:7 2014 pg 1165-78

    MeSH

    Animals
    Databases, Factual
    Edible Grain
    Feeding Behavior
    Fruit
    Humans
    Incidence
    Iodine
    Meat
    Observational Studies as Topic
    Odds Ratio
    Risk Factors
    Seafood
    Thyroid Neoplasms
    Vegetables

    Pub Type(s)

    Journal Article
    Meta-Analysis
    Research Support, Non-U.S. Gov't

    Language

    eng

    PubMed ID

    25256273

    Citation

    Liu, Zhi-Ting, and Ai-Hua Lin. "Dietary Factors and Thyroid Cancer Risk: a Meta-analysis of Observational Studies." Nutrition and Cancer, vol. 66, no. 7, 2014, pp. 1165-78.
    Liu ZT, Lin AH. Dietary factors and thyroid cancer risk: a meta-analysis of observational studies. Nutr Cancer. 2014;66(7):1165-78.
    Liu, Z. T., & Lin, A. H. (2014). Dietary factors and thyroid cancer risk: a meta-analysis of observational studies. Nutrition and Cancer, 66(7), pp. 1165-78. doi:10.1080/01635581.2014.951734.
    Liu ZT, Lin AH. Dietary Factors and Thyroid Cancer Risk: a Meta-analysis of Observational Studies. Nutr Cancer. 2014;66(7):1165-78. PubMed PMID: 25256273.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - Dietary factors and thyroid cancer risk: a meta-analysis of observational studies. AU - Liu,Zhi-Ting, AU - Lin,Ai-Hua, Y1 - 2014/09/25/ PY - 2014/9/27/entrez PY - 2014/9/27/pubmed PY - 2015/7/1/medline SP - 1165 EP - 78 JF - Nutrition and cancer JO - Nutr Cancer VL - 66 IS - 7 N2 - To better understand the relationship between dietary factors and thyroid cancer risk, we summarized the published evidence on relationship between dietary factors and thyroid cancer incidence. Searching several databases for relevant studies published by March 2014 included a total of 19 studies. We calculated summary odds ratios (ORs) for each risk factor. Based on the highest level of total consumption vs. the lowest level, the summary OR [95% (confidence interval) CI] of thyroid cancer was 0.79 (0.66, 0.94) for fish; 0.95 (0.74, 1.23) for salt water fish; 0.86 (0.63, 1.16) for fresh water fish; 0.76 (0.58, 1.00) for vegetables; 0.88 (0.72, 1.08) for shellfish; 0.93 (0.66, 1.29) for cruciferous vegetables; 0.97 (0.78, 1.21) for fruits; 0.96 (0.70, 1.34) for meat; and 1.11 (0.86, 1.42) for grains. Subgroup analysis showed that fish (OR 0.74, 95%CI: 0.59, 0.92) and shellfish (OR 0.46, 95%CI: 0.27, 0.75) consumption have a protective effect in iodine deficiency areas, whereas the ORs were not statistically significant in iodine-rich areas. Our findings indicated that fish and shellfish consumption may decrease the risk of thyroid cancer in iodine deficiency areas, although no such effect was observed in iodine-rich areas. SN - 1532-7914 UR - https://www.unboundmedicine.com/medline/citation/25256273/full_citation L2 - http://www.tandfonline.com/doi/full/10.1080/01635581.2014.951734 DB - PRIME DP - Unbound Medicine ER -