ArticleCancer epidemiology2013
Recreational physical activity and risk of papillary thyroid cancer among women in the California Teachers Study.
Article in Cancer epidemiology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 2 of them syntheses that pooled it.
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Who cites it
9 citing papers in PubMed, 2 syntheses or guidelines pooled it, 15 citations in OpenAlex.
- Physical activity and risk of thyroid cancer: a systematic review and meta-analysis of prospective cohort studies.International journal of clinical oncology · 2025Pooled it
- Physical activity, diabetes, and risk of thyroid cancer: a systematic review and meta-analysis.European journal of epidemiology · 2013Pooled it
- Environmental and lifestyle factors and risk of thyroid carcinoma: a cross-sectional study.Endocrine · 2025Article
- Incidence of thyroid cancer in Puerto Rico and the US by racial/ethnic group, 2011-2015.BMC cancer · 2019Article
- Physical Activity and Thyroid Cancer Risk: A Case-Control Study in Catania (South Italy).International journal of environmental research and public health · 2019Article
- Recreational Physical Activity and Differentiated Thyroid Cancer Risk: A Pooled Analysis of Two Case-Control Studies.European thyroid journal · 2016Article
- Obesity Does Not Modify the Risk of Differentiated Thyroid Cancer in a Cytological Series of Thyroid Nodules.European thyroid journal · 2016Article
- Annual Average Changes in Adult Obesity as a Risk Factor for Papillary Thyroid Cancer: A Large-Scale Case-Control Study.Medicine · 2016Observational
- Obesity and the risk of papillary thyroid cancer: a pooled analysis of three case-control studies.Thyroid : official journal of the American Thyroid Association · 2014Article
Corrections and comments
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Authors and funding
11 authors at 5 institutions in 1 country.
Funding
Abstract
purposeLittle is known about the relationship between physical activity and thyroid cancer risk, and few cohort data on this association exist. Thus, the present study aimed to prospectively examine long-term activity and risk of papillary thyroid cancer among women.
methods116,939 women in the California Teachers Study, aged 22-79 years with no history of thyroid cancer at cohort entry, were followed from 1995-1996 through 2009; 275 were diagnosed with invasive papillary thyroid cancer. Cox proportional-hazards regression provided relative risk (RR) estimates and 95% confidence intervals (CI) for associations between thyroid cancer and combined strenuous and moderate recreational physical activity both in the long-term (high school through age 54 years or current age if younger than 54 years) and recently (during the three years prior to joining the cohort).
resultsOverall, women whose long-term recreational physical activity averaged at least 5.5 MET-hours/week (i.e. were active) had a non-significant 23% lower risk of papillary thyroid cancer than inactive women (RR = 0.77, 95% CI: 0.57, 1.04). RR estimates were stronger among normal weight or underweight women (body mass index, BMI<25.0 kg/m(2), trend p = 0.03) than among overweight or obese women (trend p = 0.35; homogeneity-of-trends p = 0.03). A similar pattern of risk was observed for recent activity (BMI<25 kg/m(2), trend p = 0.11; BMI≥25 kg/m(2), trend p = 0.16; homogeneity-of-trends p = 0.04). Associations for long-term activity did not appear to be driven by activity in any particular life period (e.g. youth, adulthood).
conclusionsLong-term physical activity may reduce papillary thyroid cancer risk among normal weight and underweight women.
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