回避与趋近性负性人格特质对应激心血管反应模式的不同影响
摘要
<p id="C3">A cluster of negative personality traits such as trait anxiety, trait depression, trait anger, trait hostility, has long been viewed as high risk factors that lead to cardiovascular diseases. Patterns of stress cardiovascular responses are the important physiological pathways through which personality traits influence cardiovascular diseases. In the past decades, studies exploring the associations between negative personality traits and patterns of stress cardiovascular responses have mainly focused on a specific negative trait and its cardiovascular responses to a single low/moderate stress exposure, however, no study to date has differentiated two types of negative traits and their relations with patterns of cardiovascular responses to repeated stress exposure under distinct intensity conditions. The present study sought to investigate the associations between avoidance vs. approach negative traits and the patterns of cardiovascular responses to two successive stress exposures under moderate and high intensity psychosocial stress conditions. Moreover, the potential mechanisms underlying these associations were preliminarily explored by considering the mediating role of stress cognitive appraisals. <p id="C201">Eligible 167 healthy undergraduate students recruited from universities in Xi'an (58 males, 109 females), aged 17~25 years (19.23 ± 1.13), took part in the present study. Upon arrival, participants completed a package of questionnaires including trait depression, trait anxiety, trait anger, and trait hostility. Then, participants were randomly assigned to either moderate- or high-intensity psychosocial stress condition, and underwent four laboratory phases: baseline, stress exposure 1, post-stress 1, stress exposure 2. Hierarchical multiple regression analyses were utilized to examine the main effects of stress intensity, avoidance and approach negative traits, as well as interaction effects of negative traits and stress intensity in predicting ca