Mild TSH elevation is independently associated with height in children.

Authors

Mengying Zhang, Mengqi Li

Published in

Journal of pediatric endocrinology & metabolism : JPEM. Oct 14, 2026. Epub Oct 14, 2026.

Abstract

To investigate whether mildly elevated thyroid stimulating hormone (TSH) (<10 mIU/L) is associated with height in children independently of the growth hormone-insulin-like growth factor 1 (GH-IGF-1) axis, and to assess sex differences.
This retrospective cross-sectional study included 2,447 children aged 2-10 years presenting for slow growth evaluation (2022-2024). Multivariable linear regression was used with adjustment for age, sex, and IGF-1 SDS; restricted cubic splines (RCS) were used to assess the dose-response relationship. Sex-stratified and sensitivity analyses were performed.
Mildly elevated TSH was present in 96 (3.92 %) children. Overall, TSH was inversely associated with height SDS (β=-0.03, p<0.001) independently of IGF-1; RCS confirmed linearity. The association was significant in boys (β=-0.03, p=0.002) and borderline in girls. Boys with elevated TSH had lower height SDS (β=-0.18, p=0.025). Sensitivity analyses: the association persisted after excluding low IGF-1 (β=-0.02, p=0.004) but not in children with short stature (height SDS ≤-2).
Mildly elevated TSH is independently associated with reduced height in children aged 2-10 years, independent of IGF-1. The association was significant in boys and borderline in girls, with no significant interaction. The absence of bone age and parental height data is a major limitation. These findings support growth monitoring rather than routine levothyroxine therapy.

PMID:
42865251
Bibliographic data and abstract were imported from PubMed on 13 Oct 2026.

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