Department of Psychology, Concordia University, 7141 Sherbrooke St W, Montréal H4B 1R6, Canada; Center for Clinical Research in Health, Concordia University, 7141 Sherbrooke St W, Montréal H4B 1R6, Canada.
Department of Psychology, Concordia University, 7141 Sherbrooke St W, Montréal H4B 1R6, Canada; Center for Clinical Research in Health, Concordia University, 7141 Sherbrooke St W, Montréal H4B 1R6, Canada; PERFORM Center, Concordia University, 7141 Sherbrooke St W, Montréal H4B 1R6, Canada.
Int J Psychophysiol. 2021 Apr;162:79-85. doi: 10.1016/j.ijpsycho.2021.02.001. Epub 2021 Feb 5.
Stress exposure increases risk for depressive symptoms. However, there are substantial individual differences in affective responses to stress. High-frequency heart rate variability (HF-HRV), a marker of vagally-mediated parasympathetic activity, has been conceptualized as a psychophysiological index of emotion regulation that may moderate individuals' responses to stress. Using a daily diary design, we tested whether individual differences in resting HF-HRV moderated the association between daily child-related stress and negative affect among a sample of 84 heterosexual couples with preschool-aged children. After controlling for participants' age, gender, socioeconomic status, employment status, and ethnicity, hierarchical linear modeling revealed that resting HF-HRV moderated both the between-person and within-person associations between self-reported child-related stress and daily negative affect. Between-person analyses indicated that the strength of the positive association between mean daily child stress and negative affect across the daily diary period increased with decreasing resting HF-HRV. Similarly, within-person analyses indicated that on days when participants reported more child-related stress than usual, the magnitude of the increase in negative affect on that day was inversely related to resting HF-HRV. Taken together, these findings suggest that lower resting HF-HRV may index vulnerability to stress-related disturbances in negative affect. This increased negative affective response to daily stress may be one pathway through which individuals with lower resting HF-HRV are at increased risk for depressive symptoms over time.
压力暴露会增加抑郁症状的风险。然而，个体对压力的情感反应存在很大差异。高频心率变异性（HF-HRV），一种迷走神经介导的副交感活动的标志物，被概念化为情绪调节的心理生理指标，可能调节个体对压力的反应。我们使用日常日记设计，测试了在有学龄前儿童的 84 对异性恋夫妇样本中，静息 HF-HRV 个体差异是否调节了日常与儿童相关的压力与负面情绪之间的关联。在控制了参与者的年龄、性别、社会经济地位、就业状况和种族之后，分层线性建模显示，静息 HF-HRV 调节了自我报告的与儿童相关的压力与日常负面情绪之间的个体间和个体内关联。个体间分析表明，在日常日记期间，每日儿童相关压力与负面情绪之间的正相关强度随着静息 HF-HRV 的降低而增加。同样，个体内分析表明，当参与者报告比平时更多的与儿童相关的压力时，当天负面情绪的增加幅度与静息 HF-HRV 呈负相关。总之，这些发现表明，较低的静息 HF-HRV 可能反映了对与压力相关的负面情绪障碍的脆弱性。这种对日常压力的负面情绪反应增加可能是静息 HF-HRV 较低的个体随着时间的推移患抑郁症状风险增加的一个途径。
