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trajectory on the occurrence of new-onset CVD. Methods The Kailuan Study has been followed up every 2 years that began
in 2006. A prospective cohort study method was used to select those who participated in three consecutive health examinations
in 2006,2008,and 2010,with complete triacylglycerol and blood glucose levels,and no history of malignant tumors,
cardiovascular and cerebrovascular diseases as the observation objects. The 2010 health check-up time point was used as the
starting point for the follow-up,and the occurrence of CVD,death or the end of the follow-up (2017-12-31) was used as
the end point of the follow-up. SAS Proc Traj program was used to establish the trajectory model of the research object TyG,
four different groups were determine daccording to the longitudinal trajectories of TyG:low-stable group,medium and low-
stable group,medium and high-stable group,and high-stable group. The general data and laboratory observation indicatorsof
the patients were collected and the Cox proportional hazard model was used to analyze the influence of TyG longitudinal trajectory
on new-onset CVD. Results A total of 54 258 subjects meeting the inclusion criteriawere included,including 13 150 cases
(24.24%) in the low-stable group,28 488 cases (52.50%) in the medium-low-stable group,10 808 cases (19.92%)
in the medium-high-stable group,and 1 812 cases (3.34%)cases in the high-stable group. There were statistically significant
differences in the age,gender,BMI,heart rate,TyG2006,TyG2008,TyG2010,HDL-C,LDL-C,UA,hs-CRP,TG,
FBG,ALT,smoking,drinking,and physical exercise and the proportion of taking lipid-lowering drugs among different groups
(P<0.05). The subjects were followed up for (6.73±1.12) years,and a total of 2 267 cases of CVD occurred,including
499 cases of acute myocardial infarction and 1 800 cases of stroke. There were significant difference in the cumulative incidence of
CVD of patients among different TyG longitudinal trajectory groups (P<0.05). Cox regression analysis showed after adjusting for
confounding factors,the HR value (95%CI) of CVD in each group were 1.29(1.14,1.46),1.40(1.20,1.63) and 1.76(1.41,
2.20) when compared with the low-stable group;the HR value (95%CI) for acute myocardial infarctionwere 1.48(1.10,1.98),
1.91(1.36,2.69)and 2.03(1.22,3.36)in each group when compared with the low-stable group;the HR value (95%CI)
for stroke were 1.23(1.07,1.42),1.27(1.07,1.50) and 1.63(1.27,2.08)in each group;the HR value (95%CI)
for ischemic strokewere 1.25(1.08,1.45),1.35(1.12,1.60) and 1.77(1.37,2.30)in each group. Conclusion The
increased longitudinal trajectory of TyG index is a risk factor for the incidence of CVD and is independent of the baseline of TyG index.
【Key words】 Cardiovascular diseases;Triglyceride-glucose index;Longitudinal trajectory;Risk factors;Follow-
up studies;Prospective cohort studies;Survival analysis
心脑血管疾病(cardiovascular disease,CVD)患病 的影响,如年龄、体育锻炼、饮食等。因此单次测量的
率及死亡率均居于我国首位 [1] 。据《中国心血管病报 TyG 水平不足以准确地反映长期 TyG 水平对 CVD 发病
告 2018》报告:我国目前 CVD 患病人数为 2.9 亿,据 的影响。
推算 10 年内 CVD 患病人数仍将快速增长 [2] 。由于对 轨迹模型是一项基于多次重复测量的数据分析技
高血压、吸烟等传统危险因素进行控制和干预,CVD 术,遵循同质发展轨迹以进行分组,可以评估长期 TyG
的防控取得了初步成效 [3] 。但近年来我国血脂异常及 变化趋势,研究不同TyG轨迹对靶器官损害的影响 [12-13] 。
糖尿病患病率明显增高,因此 CVD 患病率仍将持续处 目前,国内外尚缺乏不同 TyG 轨迹与新发 CVD 关
于上升阶段,家庭和社会所承受的疾病负担不断加重。 系的研究。开滦研究(临床试验注册号:ChiCTR-
胰岛素抵抗(insulin resistance,IR)可导致血管 TNRC-11001489)是一项始于 2006 年,现在仍在进行
损伤,被认为是 CVD 发生和发展的重要危险因素之 的基于功能社区人群心血管及相关疾病危险因素的调
一 [4] 。正常血糖胰岛素钳技术作为诊断 IR 的“金标 查及干预的大型前瞻性队列研究 [14] 。除收集观察对象
准”,检测结果准确但费时费力 [5] 。三酰甘油血糖指 TG 及 FBG 的数据外,每年对观察对象的 CVD 发病情
数(triglyceride-glucose index,TyG)是一项简便易测且 况进行随访,这为未来探究 TyG 纵向轨迹与 CVD 发病
可靠的可替代指标,通过空腹三酰甘油(triglyceride, 关系提供了机会。
TG)与空腹血糖(tasting blood glucose,FBG)水平计 1 对象与方法
算而来,与 IR 有着强相关性 [5-7] 。IRACE 等 [8] 研究 1.1 研究对象 自 2006 年起,由开滦总医院及所属 10
发现 TyG 是颈动脉粥样硬化的危险因素,ZHAO 等 [9] 家医院对开滦集团在职及离退休职工进行了第 1 次健
研究发现 TyG 与动脉硬化呈正相关,VMCUN 队列 [10] 康体检,此后每 2 年进行一次健康体检,除包括常规
以及 WANG 等 [11] 研究的结果表明 TyG 对 CVD 有较好 的随访项目外,通过医保信息系统收集观察对象每年
的预测价值。但大多数 TyG 与 CVD 发病的研究仅采用 CVD 发生的情况。本研究依托开滦研究,将连续参加
了单次测量的 TyG 水平,而 TyG 水平可受到多种因素 2006、2008、2010 年度 3 次健康体检者作为研究对象,