T4 rather than TSH correlates with BMD among euthyroid adults
Open accessAbstract
Purpose: The objective of this study was to evaluate the association between thyroid hormone and bone mineral density (BMD) among euthyroid adults. Methods: This cross-sectional study researched the information from the National Health and Nutrition Examination Survey 2007–2010. We included 3,759 euthyroid participants finally. We used multivariate linear regression models to evaluate the linear relationship between the thyroid hormone profile and BMD. Subgroup analyses stratified by gender and age were further performed. Moreover, the nonlinear relationship was characterized by fitted smoothing curves and generalized additive models, and logistic regression models were used to determine the association of thyroid-stimulating hormone (TSH) and thyroxine (T4) with previous fractures. Results: The weighted multivariable linear regression models showed no association between TSH and BMD. Free thyroxine (FT4), T4, free triiodothyronine (FT3), and total triiodothyronine (T3) were negatively associated with the total femur BMD and the total spine BMD after adjusting for all covariates. Subgroup analyses demonstrated that all groups had a negative association between T4 and BMD, even in patients with osteopenia/osteoporosis. The nonlinear relationship characterized by smooth curve fittings and generalized additive models suggested that an obvious U-shaped, an inverted U -shaped, and an L - shaped curve was exhibited between thyroid hormone and BMD in the different subgroups. In addition, normal high-level T4 was associated with an increased prevalence of previous fractures than normal low-level T4. Conclusions: In this sample of euthyroid adults, T4 exhibits a negative correlation with BMD, regardless of age and gender, in subjects with either normal or lowered BMD. Moreover, high-normal FT4 was associated with an increased prevalence of previous fractures. TSH was not associated with variations of BMD and the fracture risk.
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TSH and thyroid hormone levels within the normal range are negatively correlated with BMD among euthyroid adults.
“TSH and thyroid hormone levels within the normal range are negatively correlated with BMD among euthyroid adults [40, 41].”
From Effects of levothyroxine therapy on bone and mineral metabolism in hypothyroidism: a systematic review and meta-analysis (2025) · cites this paper as [41]
The Discussion reports a negative association between thyroid hormones (FT4, T4, FT3 and T3) and BMD in euthyroid adults. But it does not support the same general claim for TSH: the Results table shows no significant adjusted association with total femur BMD, and the paper distinguishes T4 from TSH in its conclusions. Thus the thyroid-hormone portion is supported, but the TSH portion is overstated. (LLM, conf=0.92)
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- Authors
- Sheng, N., Xing, F., Wang, J., Duan, X., & Xiang, Z.
- Affiliations
- Sichuan University (CN)
- Corresponding author
- Duan, Xin
- Xiang, Zhou
- Venue
- Frontiers in Endocrinology
- Publisher
- Frontiers Media SA
- Published
- 2023-01-09
- Volume
- 13
- Pages
- 1039079-1039079
- ISSN
- 1664-2392 (ISSN-L)
- PMC
- PMC9868946
- OpenAlex
- W4315480342
- Cited by
- 10
- References
- 38
- Citations by year
- 2026: 3 · 2025: 1 · 2024: 5 · 2023: 1
- FWCI
- 2.96
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Frontiers in Endocrinology (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- National Natural Science Foundation of China (31870961, 82202705)
- Department of Science and Technology of Sichuan Province (2023NSFSC1738, 2020YFS0140)
- Sichuan University (2019HXFH041)
- West China Hospital, Sichuan University (2023NSFSC1738, 2019HXFH041, 82202705)
- Topics
- Health Sciences › Medicine › Orthopedics and Sports Medicine › Bone health and osteoporosis research
- Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Thyroid Disorders and Treatments
- Health Sciences › Medicine › Pathology and Forensic Medicine › Vitamin D Research Studies
- Keywords
- thyroxine, thyroid-stimulating hormone, bone mineral density, euthyroid adults, free thyroxine, free triiodothyronine, total triiodothyronine, osteoporosis, osteopenia, previous fractures, fracture risk, nonlinear dose-response relationship, sex differences, age differences
- MeSH terms
- Adult, Cross-Sectional Studies, Humans, Hypothyroidism, Nutrition Surveys, Thyroid Hormones, Thyrotropin, Thyroxine, Triiodothyronine, Bone Density, Fractures, Bone
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