术前TSH水平与甲状腺结节恶性风险的相关性

Correlation between preoperative thyroid stimulating hormone level and the malignant risk of thyroid nodules

目的探究术前TSH水平与甲状腺结节恶性风险的相关性。方法回顾性分析959例甲状腺结节患者的病例资料,通过SPSS 17.0软件进行统计学分析。结果 959例患者中,良性结节组746例,甲状腺乳头状癌(PTC)组213例。PTC患者术前的血清TSH水平高于良性结节患者[(2.32±1.65)mU/L比(1.76±1.20)mU/L,P<0.001],并随TSH水平上升,PTC的患病风险增加。术前TSH水平与PTC肿瘤直径、病灶数量和淋巴结转移情况无相关性(P>0.05)。logistic回归分析结果显示,术前TSH水平是PTC发生的独立影响因素[OR=1.315,95%CI为(1.171,1.477),P<0.001]。TSH诊断PTC的最佳临界值为1.575 mU/L,此时灵敏度为62.0%,特异度为53.4%,受试者工作特征(ROC)曲线下面积为0.602(P<0.001)。结论术前TSH水平与甲状腺结节恶性风险有一定的相关性,随TSH水平的上升PTC的患病风险增加。

Objective To study the correlation between preoperative serum thyroid stimulating hormone （TSH） level and the malignant risk of thyroid nodules. Methods This study retrospectively analyzed the medical records of 959 patients with thyroid nodules. Ststistical analysis was conducted by SPSS 17.0 software. Results There were 959 patients with thyroid nodules, of which 746 cases were benign, and 213 cases were diagnosed as thyroid papillary carcinoma （PTC）. The preoperative TSH level of PTC patients was higher than that with benign nodules [（2.32±1.65） mU/L vs. （1.76±1.20） mU/L, P〈0.001]. Moreover, the higher preoperative TSH level was, the higher risk of diagnosed as PTC would be. There was no correlation between the preoperative TSH level and tumor diameter, number of lesions, and lymph nodes metastasis in PTC （P〉0.05）. Logistic regression analysis showed that, the preoperative TSH level was an independent risk factor for PTC [OR=1.315, 95% CI was （1.171, 1.477）, P〈0.001]. The best critical value of TSH in the PTC diagnosis was 1.575 mU/L. At this point, the sensitivity was 62.0%, the specificity was 53.4%, and the area under the receiver operating characteristic （ROC） curve was 0.602 （P〈0.001）. Conclusion There is a certain correlation between preoperative TSH level and malignant risk of thyroid nodules, and the risk increases with the raise of preoperative TSH level.