血清TSH水平与血脂异常的相关性研究

目的 探讨亚临床甲状腺功能减退(甲减)以及甲状腺功能正常的人群中TSH水平与血脂谱之间的关系.方法 2007年在沈阳市大东区进行糖尿病及甲状腺疾病的整群抽样调查,其中包括亚临床甲减110例和1 240名甲状腺功能正常者进入研究,研究对象既往无甲状腺病史,未服用影响甲状腺功能和调节血脂的药物.检查项目包括甲状腺功能、血脂、空腹血糖、胰岛素等.结果 (1)亚临床甲减患者高密度脂蛋白胆固醇(HDL-C)水平低于甲状腺功能正常组.(2)按照<中国成人血脂异常诊治指南>将人群分组,在超重的人群中(体重指数≥24.0 kg/m2),高低密度脂蛋白胆固醇(LDL-C)组的TSH水平明显升高[(3.07±0.27对2.41±0.11)mU/L,P=0.027],这种差异在超重女性组中更加明显.甲状腺功能正常且超重的人群中,TSH与总胆固醇呈正相关,且这种相关性不受稳态模型评估的胰岛素抵抗指数(HOMA-IR)的影响.(3)在女性中,TSH与甘油三酯呈正相关,与HDL-C呈负相关.在超重的女性组中,TSH与总胆固醇、LDL-C呈正相关,且经过年龄、性别、体重指数等因素的校正后相关性仍然存在.结论在甲状腺功能正常及亚临床甲状腺功能减退症人群中,TSH升高为血脂异常的危险因素,且独立于胰岛素抵抗.

Abstract：

Objective To investigate the relationship between serum thyrotrophin(TSH)and dyslipidemia in subclinical hypothyroid and euthyroid subjects. Methods An epidemiological study on diabetes and thyroid diseases was performed in Dadong community, Shenyang city, in 2007. 110 subjects with subclinical hypothyroidism(SCH)and 1 240 euthyroid subjects were enrolled in the study. Neither history of thyroid diseases nor administration of thyroid-related and lipid-regulating medicines were reported in these subjects. The levels of serum thyroid hormones, lipids, fasting plasma glucose(FPG), and insulin were determined. Results (1)Patients with SCH had significantly lower HDL-C levels than those who were euthyroid.(2)According to the guideline of treatment of adult dyslipidemia in China, the lipid profiles were each categorized. Mean TSH levels were higher in subjects in the dyslipidemia subclass than subjects in the normal subclass. The differences were significant in high LDL-C subclass in overweight individuals. In euthyroid overweight women, mean TSH levels were significantly higher in high LDL-C subclass. In the euthyroid population, TSH was positively associated with total cholesterol in overweight population. The association was not modified by the homestasis model assessment for insulin resistance(HOMA-IR)values.(3)TSH was associated positively with serum triglycerides and negatively with serum HDL-C in women. TSH was positively associated with total cholesterol in overweight population and positively associated with total cholesterol and LDL-C in overweight women after adjustment for age, sex, and body mass index. Conclusion Raised serum TSH seems to be a risk factor of dyslipidemia in subclinical hypothyroid and euthyroid subjects, which is independent of insulin sensitivity.

Relationship betweenserum TSH and dyslipidemia

Objective To investigate the relationship between serum thyrotrophin(TSH)and dyslipidemia in subclinical hypothyroid and euthyroid subjects. Methods An epidemiological study on diabetes and thyroid diseases was performed in Dadong community, Shenyang city, in 2007. 110 subjects with subclinical hypothyroidism(SCH)and 1 240 euthyroid subjects were enrolled in the study. Neither history of thyroid diseases nor administration of thyroid-related and lipid-regulating medicines were reported in these subjects. The levels of serum thyroid hormones, lipids, fasting plasma glucose(FPG), and insulin were determined. Results (1)Patients with SCH had significantly lower HDL-C levels than those who were euthyroid.(2)According to the guideline of treatment of adult dyslipidemia in China, the lipid profiles were each categorized. Mean TSH levels were higher in subjects in the dyslipidemia subclass than subjects in the normal subclass. The differences were significant in high LDL-C subclass in overweight individuals. In euthyroid overweight women, mean TSH levels were significantly higher in high LDL-C subclass. In the euthyroid population, TSH was positively associated with total cholesterol in overweight population. The association was not modified by the homestasis model assessment for insulin resistance(HOMA-IR)values.(3)TSH was associated positively with serum triglycerides and negatively with serum HDL-C in women. TSH was positively associated with total cholesterol in overweight population and positively associated with total cholesterol and LDL-C in overweight women after adjustment for age, sex, and body mass index. Conclusion Raised serum TSH seems to be a risk factor of dyslipidemia in subclinical hypothyroid and euthyroid subjects, which is independent of insulin sensitivity.