General Psychology and Biopsychology, Department of Psychology, Faculty of Behavioural and Social Sciences, Chemnitz University of Technology, 09107 Chemnitz, Germany.
General Psychology and Biopsychology, Department of Psychology, Faculty of Behavioural and Social Sciences, Chemnitz University of Technology, 09107 Chemnitz, Germany.
Biol Psychol. 2020 Jul;154:107905. doi: 10.1016/j.biopsycho.2020.107905. Epub 2020 Jun 5.
Research on heart rate variability (HRV) received increasing attention. This study analysed the reliability of the most common HRV parameters for baseline measurements. 103 healthy students (83 women, M = 21.72 ± 3.31 years) participated in five short-term HRV sessions, each including supine, sitting, and standing positions, respectively, spanning a time interval of eleven months. Relative reliability was evaluated by intraclass correlation coefficients, and absolute reliability by standard errors of measurement, smallest real differences, and 95 % limits of random variation. No systematic mean differences between measurements emerged. Intraclass correlation coefficients were quite low (supine: .49-.64, sitting: .40-.57, standing: .35-.56). Absolute reliability indicators revealed pronounced variations between test and retest. Influences of posture and time between measurements on reliability were small and unsystematic. We conclude that such high levels of within-subjects variability in HRV measurements (a) hamper the detection of changes over time, and (b) should be considered carefully in future analyses.
心率变异性（HRV）的研究受到越来越多的关注。本研究分析了最常用的 HRV 参数在基线测量中的可靠性。103 名健康学生（83 名女性，M=21.72±3.31 岁）参与了五次短期 HRV 测试，分别包括仰卧位、坐位和站立位，时间间隔为十一个月。相对可靠性通过组内相关系数评估，绝对可靠性通过测量误差、最小实际差异和 95%随机变化界限评估。测量之间没有出现系统的平均差异。组内相关系数相当低（仰卧位：.49-.64，坐位：.40-.57，站立位：.35-.56）。绝对可靠性指标显示测试和复测之间存在明显差异。体位和测量之间时间对可靠性的影响较小且无规律。我们得出结论，HRV 测量中的这种高水平的个体内变异性（a）阻碍了随时间的变化的检测，（b）在未来的分析中应仔细考虑。
