Table 2 Potential measures of rest-activity rhythms (further details are given in Appendix)
Parametric (Cosinor) Model | Non-parametric Model | Sleep Quantity Analysis Model (Mean or Variability) | Sleep Analysis- Circadian Phase Model |
|---|---|---|---|
Midline estimating statistic of rhythm (MESOR) | Inter-daily Stability (IS) | Mean Activity (MA) | Sleep Onset |
Amplitude | Intra-daily Variability (IV) | Time in Bed (TIB) (± Lights Off) | Sleep Offset |
Acrophase | Least active period: L5/ L5 Onset | Total Sleep Time (TST) | Sleep Midpoint |
| Â | Most active period:M10/M10 Onset | Sleep Onset Latency (SOL) | Sleep Regularity Index (SRI) |
| Â | Amplitude | Sleep Efficiency (SE %) | Â |
| Â | Relative Amplitude | Fragmentation Index (FI %) | Â |
|  |  | Wake after sleep onset (WASO) (± N awakenings > 5 min) |  |