Short-term nonlinear heart rate variability indices demonstrated substantial relative reliability (0.6 < ICC < 0.8) in half of the indices and good absolute reliability in the majority.
Observational (n=42)
Are nonlinear properties of heart rate variability from short-term recordings reliable in healthy subjects?
Nonlinear HRV parameters from short-term recordings show substantial relative reliability in half of the indices, making them suitable for individual test-retest evaluations but requiring larger sample sizes for group comparisons.
Several parameters assessing nonlinear properties of heart rate variability (HRV) from short-term (140%. Relative reliability was substantial (0.6 < ICC < 0.8) in half of the indices, moderate in one and poor in the remaining. Compared to classical linear indices, nonlinear HRV parameters seem more suitable for individual test-retest evaluations but, due to a reduced ICC, they need increased sample size in comparative studies involving two groups of subjects.
Maestri et al. (Tue,) conducted a observational in Healthy subjects (n=42). Short-term nonlinear heart rate variability indices was evaluated on Absolute reliability (95% limits of random variation) and relative reliability (intraclass correlation coefficient). Short-term nonlinear heart rate variability indices demonstrated substantial relative reliability (0.6 < ICC < 0.8) in half of the indices and good absolute reliability in the majority.
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