Research
Adherence
Overall metrics (StDev, IS) overestimate sleep regularity when based on study lengths of 7 days or less, whereas consecutive metrics (SRI, CPD) are more stable but require larger sample sizes.
If you are analyzing sleep data for 7 days or less, be cautious with overall metrics like Interdaily Stability (IS) as they tend to overestimate regularity. Consecutive metrics like SRI are more stable for short durations but require larger sample sizes for group comparisons. For individual short-term assessments, prioritize SRI or CPD.
StrongQualifiesVERY_HIGH confidence
Overall metrics, especially IS, overestimate sleep regularity, when based on ≤ 7 days of data, compared with what would be calculated using the same metric in the same individual simply from a longer recording.
Why this rating
Based on extensive simulations varying study length from 2-28 days with confidence interval analysis.
Source
Measuring sleep regularity: theoretical properties and practical usage of existing metrics
Dorothee Fischer et al. · SLEEP · 2021
mechanism_onlyCited 189×
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