Are Possible Risk Factors for Differentiated Thyroid Cancer of Prognostic Importance?
- 1 July 2006
- journal article
- research article
- Published by Mary Ann Liebert Inc in Thyroid®
- Vol. 16 (7), 659-666
- https://doi.org/10.1089/thy.2006.16.659
Abstract
Objective: The only established risk factor for differentiated thyroid cancer (DTC) is ionizing radiation. How ionizing radiation and other possible risk factors for DTC influence the prognosis has not extensively been investigated. We studied if factors such as smoking, number of children, previous thyroid disorders, previous radiotherapy toward the neck, family history of thyroid diseases, and malignancies influenced survival for patients with DTC. Design: A nested case-control study was conducted within the cohort of all patients diagnosed with DTC in Sweden between 1958–1987. Cases consisted of patients who died from DTC. One control, matched by age at diagnosis, gender, and calendar period was randomly selected from the risk set for each case. Information of risk factors was collected from the medical records. Associations between these factors and prognosis were assessed using conditional logistic regression. Main outcome: Smokers had a borderline significant increased risk of dying from DTC. Previous radiotherapy towards the neck region had no prognostic implication. A family history of DTC influenced prognosis although not significant due to few cases. The remaining risk factors studied did not influence survival. Conclusions: In conclusion, smokers seemed to have a worsened prognosis compared to nonsmokers and a family history of thyroid cancer had a nonsignificant negative effect on survival.Keywords
This publication has 28 references indexed in Scilit:
- Clinically significant prognostic factors for differentiated thyroid carcinomaCancer, 2005
- Cigarette smoking and the risk of goitre and thyroid nodules amongst parous womenJournal of Internal Medicine, 2005
- Medullary thyroid carcinomaClinical Endocrinology, 2004
- Effects of Conjugated Equine Estrogen in Postmenopausal Women With HysterectomyJAMA, 2004
- Family history of benign thyroid disease and cancer and risk of thyroid cancerEuropean Journal Of Cancer, 2004
- Breast cancer and hormone-replacement therapy: the Million Women StudyThe Lancet, 2003
- TNM, sixth edition: New developments in general concepts and rulesSeminars in Surgical Oncology, 2003
- Papillary and Follicular Thyroid CarcinomaNew England Journal of Medicine, 1998
- Post-Chernobyl Thyroid Carcinoma in Belarus Children and Adolescents: Comparison with Naturally Occurring Thyroid Carcinoma in Italy and FranceJournal of Clinical Endocrinology & Metabolism, 1997
- Risk Factors for Thyroid CancerTrends in Endocrinology & Metabolism, 1997