Table 5 Multivariate linear regression analysis to determine the prediction power of different parameters on PLM
From: Periodic limb movement index and severity of obstructive sleep apnea
Variables | B | Std. Error | Beta | Sig |
|---|---|---|---|---|
Constant | − 47.2 | 49.9 | –- | 0.3 |
Age (years) | 0.16 | 0.11 | 0.11 | 0.1 |
BMI (kg/m2) | − 0.06 | 0.16 | − 0.03 | 0.7 |
St score | 1.16 | 1.47 | 0.06 | 0.43 |
Epworth score | − 1.9 | 1.1 | − 0.13 | 0.07 |
Total time in bed | − 0.77 | 2.8 | − 0.05 | 0.8 |
Total sleep time | 0.32 | 3.3 | 0.02 | 0.9 |
Sleep efficiency | 0.21 | 0.21 | 0.11 | 0.3 |
RDI | − 0.24 | 0.14 | − 0.27 | 0.08 |
Apnea index | 0.29 | 0.12 | 0.19 | 0.01* |
Hypopnea index | 0.16 | 0.97 | 0.25 | 0.8 |
Baseline O2 saturation | 0.16 | 0.97 | 0.03 | 0.8 |
Minimal SpO2 | 0.04 | 0.17 | 0.02 | 0.8 |
Average SpO2 | 0.44 | 0.92 | 0.08 | 0.6 |
Desaturation index | 0.17 | 0.07 | 0.23 | 0.02* |
Arrhythmia index | 0.007 | 0.01 | 0.03 | 0.4 |
PLMs with arousal index | 3.4 | 0.39 | 0.58 | < 0.001* |
Wake index | 0.18 | 0.18 | 0.07 | 0.3 |
AHI | 0.16 | 0.13 | 0.18 | 0.2 |