Journal
FRONTIERS IN ENDOCRINOLOGY
Volume 13, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fendo.2022.913749
Keywords
older; levothyroxine; subclinical hypothyroidism; cholesterol; triglyceride; low-density lipoprotein cholesterol; apolipoprotein B
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Funding
- 1.3.5 project for disciplines of excellence, West China Hospital, Sichuan University [ZYGD18016]
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The results of this meta-analysis suggest that levothyroxine treatment may reduce total cholesterol, triglycerides, low-density lipoprotein cholesterol, and apolipoprotein B levels in older patients with subclinical hypothyroidism (SCH). However, it does not significantly affect bone mineral density, fatigue, hypothyroidism symptoms, quality of life, body mass index, cognitive function, depression, blood pressure, or increase the incidence of adverse events in older SCH patients.
Background: Subclinical hypothyroidism (SCH) is usually treated with levothyroxine, but there is controversy as to whether SCH should be treated, especially for older patients. The aim of the systematic review and meta-analysis was to evaluate whether levothyroxine has a beneficial or harmful effect on older patients with SCH. Methods: Databases including PubMed, Embase, Cochrane Library, Web of Science, Wanfang, Weipu and China National Knowledge Infrastructure were searched from inception until December 21, 2021. Subjects must be diagnosed with SCH, and older than or equal to 60 years of age. Interventions should be thyroid hormone therapy (e.g. levothyroxine). The literature was independently screened by 2 researchers. Statistical analysis was performed using RevMan5.3 software. Results: A total of 13 articles were included. Meta-analysis results showed that in older SCH patients, levothyroxine can significantly reduce cholesterol (TC) (p < 0.00001), triglyceride (TG) (p < 0.00001), low-density lipoprotein cholesterol (LDL-C) (p = 0.03) and apolipoprotein B (ApoB) (p < 0.00001). In addition, levothyroxine had no significant effect on bone mineral density, fatigue, hypothyroidism symptoms, quality of life, BMI, cognitive function, depression, blood pressure, etc. in older SCH patients, and also did not significantly increase the incidence of adverse events. Conclusions: Among older SCH patients, levothyroxine treatment may reduce TC, TG, LDL-C, and ApoB.
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