TY - JOUR
T1 - Anthropometric factors and physical activity and risk of thyroid cancer in postmenopausal women
AU - Kabat, Geoffrey C.
AU - Kim, Mimi Y.
AU - Thomson, Cynthia A.
AU - Luo, Juhua
AU - Wactawski-Wende, Jean
AU - Rohan, Thomas E.
PY - 2012/3
Y1 - 2012/3
N2 - Purpose: To investigate the associations of anthropometric factors and physical activity with risk of thyroid cancer in a large prospective study. Methods: We examined these associations with risk of incident thyroid cancer in a cohort of 144,319 postmenopausal women enrolled in the Women's Health Initiative. Cox proportional hazards models were used to estimate hazard ratios (HRs) and 95% confidence intervals (95% CI) for factors of interest with risk of all thyroid cancer (n = 294) and of the two major subtypes: papillary (n = 245) and follicular thyroid cancer (n = 32). Results: After adjustment for covariates, measured height at baseline was positively associated with thyroid cancer overall (HR for highest vs. lowest quartile 1.48, 95% CI 1.04-2.13, p for trend 0.02) and with papillary carcinoma (HR 1.49, 95% CI 1.01-2.21, p for trend 0.03, respectively). For each 5 cm-increase in height, the HR for all thyroid cancer was 1.15, 95% CI 1.04-1.27 and for papillary thyroid cancer was 1.14, 95% CI 1.03-1.27. In addition, self-reported weight at age 18 was positively associated with risk of papillary thyroid cancer. In contrast, baseline weight, body mass index, waist circumference, hip circumference, waist-hip ratio, weight change from age 18 to baseline, and level of self-reported recreational physical activity were not associated with risk. Conclusions: Our results suggest that attained stature is a risk factor for thyroid cancer in postmenopausal women. This association may reflect the influence of either genetic or environmental factors in early life on risk of thyroid cancer.
AB - Purpose: To investigate the associations of anthropometric factors and physical activity with risk of thyroid cancer in a large prospective study. Methods: We examined these associations with risk of incident thyroid cancer in a cohort of 144,319 postmenopausal women enrolled in the Women's Health Initiative. Cox proportional hazards models were used to estimate hazard ratios (HRs) and 95% confidence intervals (95% CI) for factors of interest with risk of all thyroid cancer (n = 294) and of the two major subtypes: papillary (n = 245) and follicular thyroid cancer (n = 32). Results: After adjustment for covariates, measured height at baseline was positively associated with thyroid cancer overall (HR for highest vs. lowest quartile 1.48, 95% CI 1.04-2.13, p for trend 0.02) and with papillary carcinoma (HR 1.49, 95% CI 1.01-2.21, p for trend 0.03, respectively). For each 5 cm-increase in height, the HR for all thyroid cancer was 1.15, 95% CI 1.04-1.27 and for papillary thyroid cancer was 1.14, 95% CI 1.03-1.27. In addition, self-reported weight at age 18 was positively associated with risk of papillary thyroid cancer. In contrast, baseline weight, body mass index, waist circumference, hip circumference, waist-hip ratio, weight change from age 18 to baseline, and level of self-reported recreational physical activity were not associated with risk. Conclusions: Our results suggest that attained stature is a risk factor for thyroid cancer in postmenopausal women. This association may reflect the influence of either genetic or environmental factors in early life on risk of thyroid cancer.
KW - Body mass index
KW - Follicular type
KW - Height
KW - Papillary type
KW - Physical activity
KW - Postmenopausal women
KW - Thyroid carcinoma
KW - Waist circumference
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U2 - 10.1007/s10552-011-9890-9
DO - 10.1007/s10552-011-9890-9
M3 - Article
C2 - 22212611
AN - SCOPUS:84862488112
SN - 0957-5243
VL - 23
SP - 421
EP - 430
JO - Cancer Causes and Control
JF - Cancer Causes and Control
IS - 3
ER -