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           CHD. Methods From October 2017 to February 2018,561 patients diagnosed CHD from the Department of Cardiology of
           Guangdong Provincial People's Hospital were selected,and divided into coronary heart disease without depression group and
           CHD combined depression group according to whether depression was combined,which was evaluated by the patient health
           Questionnaire-9 (PHQ-9). The gender,age,body mass index (BMI),comorbid diseases (hypertension,diabetes,
           dyslipidemia,acute myocardial infarction),the levels of high-sensitivity C-reactive protein (hs-CRP),high-sensitivity
           troponin T (hs-cTnT),N-terminal-B-type natriuretic peptide precursor (NT-proBNP),serum free triiodothyronine,free
           thyroxine,thyroid-stimulating hormone,free triiodothyronine (FT 3 ),free thyroxine (FT 4 )and thyroid stimulating hormone
           (TSH)of patients wre recorded. Univariate and multivariate Logistic regression was used to analyze the effect of FT 3  on the risk
           of depression in patients with CHD. Results CHD without depression group included 350 cases(62.4%),CHD complicated
           with depression group included 211 cases (37.6%),with 148 mild depression cases(26.4%),46 moderate depression
           cases(8.2%),17 severe depression cases (3.0%). The level of FT 3  in the CHD complicated with depression group was lower
           than that in the CHD without depression group(P<0.05),but there was no significant difference in FT 4  and TSH levels between
           the CHD complicated with depression group and the CHD without depression group(P>0.05). PHQ-9 score was negatively
           correlated with FT 3  level(r s =-0.114,P<0.05) and positively correlated with age(r s =0.093) and hs-CRP(r s =0.090) (P<0.05)
           in the CHD combined with depression group. The results of the univariate and multivariate Logistic regression to analyze the effect
           of FT 3  on the risk of depression in patients with CHD showed that for each standard deviation of FT 3 ,the risk of depression in
           patients with CHD decreased by 20%〔OR=0.8,95%CI(0.67,0.96)〕. Similar results were observed in the FT 3  quintile
           stratified analysis,in which the lowest risk of incident depression was observed in CHD patients in the FT 3  quartile (4.98-5.34
           pmol / L),andunivariate analysis (unadjusted) showed a significant trend in OR values among the quintiles of FT 3 (P<0.05).
           Conclusion The level of serum FT 3  in patients with CHD complicated with depression was lower than that in patients without
           depression,and the level of FT 3  in severe depression group was more significant. FT 3  may be a potential biochemical marker of
           depression in patients with CHD,and it is recommended that patients with CHD and depression should be evaluated for thyroid
           function.
               【Key words】 Coronary disease;Depressive disorder;Thyroid function;Free triiodothyronine;Correlation analysis


               冠心病是指冠状动脉结构或功能异常导致心肌缺                           1 对象与方法
           血、缺氧而发生的心脏病,又称缺血性心脏病,包括急                            1.1 研究对象 选取 2017 年 10 月至 2018 年 2 月于广
           性或慢性冠脉综合征两大类型,临床表现主要为心绞痛、                           东省人民医院心内科收治并确诊为冠心病的患者 561
           缺血性心力衰竭、心肌梗死或猝死               [1-2] 。抑郁是一种情         例,其中男 433 例,女 128 例;年龄 35~90 岁,平均年
           绪、行为和情感调节障碍的精神疾病,以至少持续 2 周                          龄(63.7±10.1)岁;平均体质指数(BMI)(24.46±3.04)
                                                                   2
           的情绪低落和快感缺失(失去兴趣或愉悦感)为主要特                            kg/m 。纳入标准:(1)冠状动脉造影至少一条冠状动
           征,可伴有躯体症状(如疲劳和体质量波动)和认知症                            脉血管狭窄程度≥ 50%;(2)患者知情同意且自愿参
           状(如注意力不集中和消极认知)                [3] 。冠心病与抑郁          加本研究,完成健康问卷 -9(PHQ-9)              [7] 评估。排除
           症相互影响,冠心病容易引发抑郁情绪,抑郁症又可作                            标准:(1)冠状动脉造影每条血管狭窄 <50%;(2)
           为冠心病发生、发展的危险因素,两者共病使患者症状                            因病情危重如意识障碍、心功能分级Ⅳ级等而不能配合
           加重、生活质量下降、不良心血管事件发生率增加、病                            调查的患者;(3)合并有甲状腺疾病、自身免疫性疾病、
           情恶化   [4] 。冠心病合并抑郁症的共病机制包括神经内                       扩张型心肌病、肥厚型心肌病、脑血管疾病、严重瓣膜
           分泌系统失调、炎性反应、血小板活化、自主神经功能                            疾病的患者;(4)有严重精神疾病或认知功能障碍的
           紊乱、内皮功能障碍等          [5] ,神经内分泌系统之一的下                患者。所有研究对象自愿参加,并获得口头知情同意。
           丘脑 - 垂体 - 甲状腺(HPT)轴系统与抑郁症的发展和                       本研究通过广东省人民医院伦理委员会审查批准(批准
                  [6]
           反应有关 。冠心病和抑郁症均是危害健康的常见疾病,                           号:GDREC2017203H)。
           两者共病患者的诊治值得医护人员重视。然而,HPT 轴                          1.2 研究方法
           对于冠心病合并抑郁患者的作用机制尚不清楚,甲状腺                            1.2.1 抑郁情况评估 采用 PHQ-9 量表评估患者抑郁
           相关激素特点的研究尚且欠缺。因此,评估冠心病患者                            情况,总分 <5 分为无抑郁,5~9 分为轻度抑郁,10~14
           抑郁状态及探究其甲状腺功能状况,对“双心医疗”实                            为中度抑郁,15~27 分为重度抑郁。患者于冠状动脉造
           践具有重要的临床意义。故本研究拟分析冠心病合并抑                            影术前 1 d,在经过精神科培训的心内科医生监督下完
           郁症患者与甲状腺功能的相关性。                                     成 PHQ-9 量表评估。按照是否合并抑郁将患者分为冠
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