摘要
目的:探讨本市妊娠5-7周妇女甲状腺自身抗体对甲状腺激素( TH)的影响。方法对700例沈阳市妊娠5-7周妇女进行固相化学发光酶免疫法测定血清促甲状腺激素( TSH)和游离甲状腺素( FT4),同时用化学发光法测定甲状腺过氧化物酶抗体( TPOAb)水平。结果⑴早孕妇女尿碘中位数185.5μg/L(碘充足水平);⑵甲状腺疾病患病率8.7%,其中甲亢1.0%,亚甲亢1.0%,甲减0.1%,亚甲减6.6%。亚甲亢患病率明显低于亚甲减( P <0.01);⑶孕妇TPOAb阳性检出率11.0%,其中TSH≥2.5 mU/L组20.3%,两者比较差异有统计学意义( P <0.01)。163例TSH≥2.5 mU/L孕妇中有47例TSH≥4.1 mU/L,与TSH≥2.5 mU/L组比较,TSH≥4.1 mU/L组TPOAb阳性率显著升高( RR=2.5,95%CI 1.1-6.0, P <0.05)。与TSH 0.13-2.5 mU/L组比较,TSH≥2.5 mU/L组TPOAb 阳性率显著升高(RR=2.4,95%CI 1.3-4.6, P <0.01)。 TSH正常组(0.13-4.1 mU/L)TPOAb阳性率显著高于TSH 0.13-2.5 mU/L组(RR=2.4,95%CI 1.2-4.6, P <0.01)。与TSH<0.13 mU/L组比较,TSH≥2.5 mU/L组和TSH 0.13-2.5 mU/L组TPOAb阳性率无显著变化( P >0.05);⑷与TPOAb阴性组比较,TPOAb阳性组TSH中位数显著升高( P <0.01)。 TPOAb阳性可显著增加(RR=4.9,95%CI 2.4-10.2, P <0.01)TSH升高的风险,但不显著增加(RR=1.1,95%CI 0.1-9.3)TSH降低(<0.13 mU/L)的风险,即不增加甲亢的患病风险;⑸有自然流产史、甲状腺疾病家族史及无疾病史组孕妇TPOAb阳性率比较,差异均无统计学意义( P >0.05),但有自然流产史组高滴度TPOAb与无疾病史组比较差异有统计学意义(χ2=6.75, P <0.05),而有家族史组与无疾病史组比较差异无统计学意义( P >0.05);⑹与TPOAb阴性孕妇比较, TPOAb阳性孕妇甲状腺功能紊乱的发生率显著增加( P <0.01)。结论本市早期妊娠甲状腺疾病以亚临床甲减为主。 TPOAb阳性可引起TSH异常及甲状腺功能紊乱,孕妇高滴度TPOAb水平对妊娠有不利影响。监测孕妇血甲状腺自身抗体及甲状腺激素水平,可早期发现甲状腺功能异常或先兆流产,并及时干预可提高优生优育质量。
Objective To explore effects of thyroid autoantibodies on thyroid hormone ( TH) during pregnancy 5-7 weeks in Shenyang City.Methods In this study, 700 pregnant women (pregnant 5-7 weeks) in Shenyang City were enrolled.Serum thyrot-ropin ( TSH ) and free thyroxine ( FT 4) levels were determined with solid-phase chemiluminescent enzyme immunoassay method (CMIA)and thyroid peroxidase antibody (TPOAb) concentration with electro chemiluminescent assay (ECLIA).Results ⑴ The median urinary iodine ( MUI) of early pregnancy women was 185.5 μg/L.Women were iodine-adequate .⑵The overall prevalence of thyroid diseases in early pregnancy was 8.7%.The prevalence of hyperthyroidism was 1.0%.The prevalence of subclinical hyperthy-roidism was 1.0%.The prevalence of hypothyroidism was 0.1%.The prevalence of Subclinical hypothyroidism was 6.6%.The prev-alence of subclinical hyperthyroidism was lower than that of subclinical hypothyroidism ( P 〈0.01 ) .⑶The positive rate of TPOAb in overall pregnancy women was 11.0%,and was 20.3%in group TSH≥2.5 mU/L ( P 〈0.01 ) .The positive rate of TPOAb in group TSH≥4.1 mU/L was significantly higher than that in group TSH≥2.5 mU/L (34.0%vs 20.3%, RR=2.5, 95%CI 1.1-6.0, P〈0.05 ) .The positive rate of TPOAb in group TSH≥2.5 mU/L was significantly higher than that in group TSH 0.13-2.5 mU/L group ( RR=2.4 , 95%CI 1.3-4.6 , P 〈0.01 ) .The positive rate of TPOAb in group TSH 0.13-4.1 mU/L was significantly high-er than that in group TSH 0.13-2.5 mU/L group ( RR=2.4 , 95%CI 1.2-4.6 , P 〈0.01 ) .The positive rate of TPOAb in group TSH 0.13-2.5 mU/L and TSH≥2.5 mU/L was no significant change relative to that in group TSH 〈0.13 mU/L ( P 〉0.05 ) .⑷The median TSH was 2.2 mU/L in the TPOAb-positive group , and was 1.2 mU/L in the TPOAb-negative group ( P 〈0.01 ) .The positive TPOAb ( RR=4.9 , 95%CI 2.4-10.2 , P 〈0.01 ) also increased the risk of TSH elevation , but not increased the risk of TSH loss (〈0.13 mU/L)(RR=1.1,95%CI 0.1-9.3).⑸The positive rate of high titer TPOAb(≥500 U/L)in women with his-tory of spontaneous abortion was statistically significant from that in normal women (χ2 =6.75 , P 〈0.05 ) .The positive rate of high titer TPOAb(≥500 IU/ml) in women with history of family history of thyroid diseases was no statistically significant different from that in normal women ( P 〉0.05).⑹A percentage (29.0%) of pregnancy women with positive TPOAb had dysthyroid .A percentage (6.3%) of pregnancy women with negative TPOAb had dysthyroid ( P 〈0.01).Conclusions Subclinical hypothyroidism was capital thyroid diseases pattern during early pregnancy .The positive TPOAb caused abnormal TSH and dysthyroid .The history of spontaneous abortion was a risk factor of high titer TPOAb .Pregnant women with high titer TPOAb levels had an adverse effect on pregnancy .Moni-toring of maternal serum thyroid autoantibodies and thyroid hormone level can detect abnormal thyroid function or threatened abortion . A timely intervention can improve the procreation quality .
出处
《中国医师杂志》
CAS
2014年第6期739-742,746,共5页
Journal of Chinese Physician
基金
卫生行业科研专项项目(200802008)
辽宁省科学技术计划项目(2007225010)