Abstract
亚临床甲状腺功能减退症（甲减）是最常见的甲状腺功能异常，血清促甲状腺激素（TSH）是诊断亚临床甲减的关键指标。TSH参考范围不统一是既往亚临床甲减患病率差异较大的主要原因。目前推荐采用美国国家临床生物化学学会（NACB）标准选择参考人群，用经对数转换后的2.5%~97.5%可信区间确定TSH参考范围。但是，我们还应充分考虑个体内和个体间因素对TSH参考范围的影响，在试剂盒参考范围的基础上，结合上述因素，分析患者血清TSH升高的原因，才能对亚临床甲减做出合理的诊断和干预。.
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