Causal association between obesity and hypothyroidism: a two-sample bidirectional Mendelian randomization study

被引:12
作者
Qiu, Yingkun [1 ]
Liu, Qinyu [2 ]
Luo, Yinghua [2 ]
Chen, Jiadi [1 ]
Zheng, Qingzhu [1 ]
Xie, Yuping [1 ]
Cao, Yingping [1 ]
机构
[1] Fujian Med Univ, Dept Clin Lab, Union Hosp, Fuzhou, Peoples R China
[2] Fujian Med Univ, Dept Endocrinol, Shengli Clin Med Coll, Fuzhou, Peoples R China
关键词
Mendelian randomization; obesity; body mass index; waist circumference; hypothyroidism; THYROID-FUNCTION; SUBCLINICAL HYPOTHYROIDISM; METABOLIC SYNDROME; LEPTIN LEVELS; TSH LEVELS; SERUM TSH; INSTRUMENTS; PREVALENCE; DISEASES; HORMONES;
D O I
10.3389/fendo.2023.1287463
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
IntroductionPrevious observational studies have reported a positive correlation between obesity and susceptibility to hypothyroidism; however, there is limited evidence from alternative methodologies to establish a causal link.MethodsWe investigated the causal relationship between obesity and hypothyroidism using a two-sample bidirectional Mendelian randomization (MR) analysis. Single-nucleotide polymorphisms (SNPs) associated with obesity-related traits were extracted from a published genome-wide association study (GWAS) of European individuals. Summarized diagnostic data of hypothyroidism were obtained from the UK Biobank. Primary analyses were conducted using the inverse variance-weighted (IVW) method with a random-effects model as well as three complementary approaches. Sensitivity analyses were performed to ascertain the correlation between obesity and hypothyroidism.ResultsMR analyses of the IVW method and the analyses of hypothyroidism/myxedema indicated that body mass index (BMI) and waist circumference (WC) were significantly associated with higher odds and risk of hypothyroidism. Reverse MR analysis demonstrated that a genetic predisposition to hypothyroidism was associated with an increased risk of elevated BMI and WC, which was not observed between WC adjusted for BMI (WCadjBMI) and hypothyroidism.DiscussionOur current study indicates that obesity is a risk factor for hypothyroidism, suggesting that individuals with higher BMI/WC have an increased risk of developing hypothyroidism and indicating the importance of weight loss in reducing the risk of hypothyroidism.
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页数:13
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