Table 3.
Principal Components Analysis of sleep health metrics: Ru SATED, Ru SATED + OSA and architecture, Sleep Health Score (SHS), SHS-parsimonious
| Ru SATED | Ru SATED + OSA and architecture | SHS-PC1 | SHS-PC1 (parsimonious) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| α= 0.42 | α= 0.47 | α= 0.61 | α= 0.45 | ||||||||||
| Percent of Variance | 27.72% | 20.01% | 17.06% | 20.40% | 15.09% | 13.01% | 19.55% | 13.71% | 9.32% | 18.39% | 14.06% | 11.75% | |
| Also known as | PC1 | PC2 | PC3 | PC1 | PC2 | PC3 | PC1 | PC2 | PC3 | PC1 | PC2 | PC3 | |
| Ru SATED | |||||||||||||
| (Ir)regularity↓(timing) | MPsd | −0.59 | 0.26 | −0.12 | −0.45 | −0.45 | 0.06 | −0.31 | −0.53 | 0.11 | −0.45 | −0.43 | 0.10 |
| Satisfaction/quality↓ (increasing insomnia symptoms) | Quality | −0.07 | −0.61 | −0.45 | −0.08 | 0.22 | 0.63 | −0.07 | 0.10 | 0.50 | −0.08 | 0.23 | 0.60 |
| Alertness↓ (increasing ESS) | ESS | −0.31 | −0.51 | −0.31 | −0.29 | 0.10 | 0.53 | −0.18 | −0.03 | 0.37 | −0.29 | 0.10 | 0.50 |
| Timing↓ (increasing delay) | Timing | −0.39 | 0.41 | −0.35 | −0.26 | −0.49 | −0.04 | −0.14 | −0.36 | 0.00 | −0.25 | −0.46 | 0.01 |
| Efficiency↑ (maintenance) | SME | 0.24 | 0.36 | −0.69 | 0.32 | −0.29 | 0.06 | 0.41 | −0.32 | −0.09 | 0.33 | −0.32 | 0.05 |
| Duration↗ | TST | 0.58 | 0.05 | −0.29 | 0.50 | 0.21 | −0.07 | 0.33 | 0.24 | −0.03 | 0.49 | 0.24 | −0.07 |
| PSG (architecture) | |||||||||||||
| Apnea-Hypopnea Index↓ | AHI | −0.38 | 0.43 | −0.23 | −0.32 | 0.18 | −0.29 | −0.38 | 0.38 | −0.27 | |||
| % N3↗ | % N3 | 0.14 | −0.34 | −0.18 | 0.14 | −0.12 | 0.08 | 0.15 | −0.31 | −0.14 | |||
| % R↗ | % R | 0.35 | −0.25 | 0.48 | 0.27 | −0.05 | 0.53 | 0.35 | −0.17 | 0.51 | |||
| SHS additions | |||||||||||||
| Irregularity↓ (duration) | TS Tsd | −0.27 | −0.42 | 0.15 | |||||||||
| Onset latency↓ | SO Lact | −0.11 | 0.26 | 0.33 | −0.06 | 0.34 | 0.12 | ||||||
| Fragmentation↓ | FI | −0.44 | 0.36 | 0.11 | |||||||||
| Wake after sleep onset↓ | WASO | −0.32 | −0.01 | −0.28 | |||||||||
a
Ru SATED: Regularity Satisfaction Alertness Timing Efficiency Duration. SHS: Sleep Health Score. SHS (PC1): Sleep Health Score principal component 1. Ru SATED + OSA and architecture: Regularity Satisfaction Timing Efficiency Duration + obstructive sleep apnea + sleep architecture. ESS: Epworth Sleepiness Scale. % N3: % non-rapid eye movement, stage 3 sleep. % R: % rapid eye movement sleep. PSG: polysomnography.
b
↑ = Higher is better; ↓ = lower is better; ↗ = generally higher is better, but overexpression can be problematic (eg long sleepers, excessive % R)