Severity of thyrotoxicosis is a risk factor for excessive weight gain in treated hyperthyroidism
Objective: Hyperthyroidism is characterized by weight fluctuations and overshoot of weight regain following treatment. We aimed to identify parameters predicting peak percentage weight gain (PWG) in the post-treatment period. Methods: We included 110 patients (73 (66.4%) women) with hyperthyroidism...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Bioscientifica
2025-05-01
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| Series: | European Thyroid Journal |
| Subjects: | |
| Online Access: | https://etj.bioscientifica.com/view/journals/etj/14/3/ETJ-24-0373.xml |
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| Summary: | Objective: Hyperthyroidism is characterized by weight fluctuations and overshoot of weight regain following treatment. We aimed to identify parameters predicting peak percentage weight gain (PWG) in the post-treatment period. Methods: We included 110 patients (73 (66.4%) women) with hyperthyroidism 6–36 months after treatment initiation. The primary outcome was PWG of ≥10% (group A) or <10% (group B). We performed adjusted analyses by logistic regression with age, sex, disease-related weight loss, hypothyroidism occurrence, free T4 at diagnosis (fT4-t0) and disease duration as independent variables. Results: Post-treatment mean (SD) weight gain was 7.4 (5.22) kg, whereas disease-related weight loss was 5.3 (5.15) kg. Group A (52.7% participants) compared to group B had significantly higher median (IQR) fT4-t0 at 47.4 (36.2, 97.2) vs 29.3 (22.8, 40.4) ng/dL (P < 0.001) and disease-related weight loss at 6.8 (3, 10) vs 2.5 (0, 4.8) kg (P < 0.001) and non-significantly higher presentation free triiodothyronine at 19.6 (10.4, 44.1) vs 11.8 (8.7, 22.9) pg/mL (P = 0.078) and TRAb at 6.3 (3, 16.1) vs 4.2 (2.4, 8.7) IU/L (P = 0.093), respectively. Significant predictor variables of post-treatment PWG in logistic regression were disease-related weight loss (OR = 1.23, P = 0.002) and fT4-t0 (OR = 1.04, P = 0.008). Conclusion: More than half the patients with hyperthyroidism had ≥10% PWG post-treatment. Indicators of disease severity, namely disease-related weight loss and baseline thyroid hormones, were predictive of excessive weight gain post-treatment and could be utilized for risk stratification and early intervention. |
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| ISSN: | 2235-0802 |