Using Restricted Cubic Splines to Study the Trajectory of Systolic Blood Pressure in the Prognosis of Acute Myocardial Infarction

Frontiers in Cardiovascular Medicine

卷:8

Jun Lyu¹  Fengzhi Zhao²  Hui Liu³  Shuai Zheng⁴  Wen Ma⁵  Didi Han⁵  Rui Yang⁵  Wentao Wu⁵  Fengshuo Xu⁵ 

[1] Department of Clinical Research, The First Affiliated Hospital of Jinan University, Guangzhou, China;

[2] Intensive Care Unit, The First Affiliated Hospital of Jinan University, Guangzhou, China;

[3] School of Public Health, Lanzhou University, Lanzhou, China;

[4] School of Public Health, Shaanxi University of Chinese Medicine, Xianyang, China;

[5] School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, China;

关键词: SBP;    AMI;    prognosis;    non-linear;    MIMIC;   

DOI  :  10.3389/fcvm.2021.740580

来源: DOAJ

【 摘 要 】

Background: Acute myocardial infarction (AMI) is still the most serious manifestation of coronary artery disease. Systolic blood pressure (SBP) is the best predictor of blood pressure in AMI. Thus, its influence on AMI is necessary to be explored.Methods: A total of 4,277 patients with AMI were extracted from the Medical Information Mart for Intensive Care database. Chi-square test or Student's t-test was used to judge differences between groups, and Cox regression was used to identify factors that affect AMI prognosis. SBP was classified as low (<90 mmHg), normal (90–140 mmHg), or high (>140 mmHg), and a non-linear test was performed. Meaningful variables were incorporated into models for sensitivity analysis. Patient age was classified as low and high for subgroup analysis, and the cutoff value of the trajectory was identified. P < 0.05 indicates statistical significance.Results: The effect of SBP on the prognosis of patients with AMI is non-linear. The risks in models 1–3 with low SBP are 6.717, 4.910, and 3.080 times those of the models with normal SBP, respectively. The risks in models 1–3 with high SBP are 1.483, 1.637, and 2.937 times those of the models with normal SBP, respectively. The cutoff point (95% confidence interval) of the trajectory is 114.489 mmHg (111.275–117.702 mmHg, all P < 0.001).Conclusions: SBP has a non-linear effect on AMI prognosis. Low and high SBP show risks, and the risk of low SBP is obviously greater than that of high SBP.

【 授权许可】

Unknown