Table 2.
Multivariate linear regression analysis* for LVGLS and myocardial work according to AHI and hypoxemia indices (T90, mean SpO2, and ODI).
| Variables | LVGLS (%) | GCW (mmHg) | GWW (mmHg) | GWE (mmHg) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Beta | t | p Value | Beta | t | p Value | Beta | t | p Value | Beta | t | p Value | |
| AHI (events/hour) | 0.051 | 0.297 | 0.768 | 0.028 | 0.156 | 0.877 | − 0.053 | − 0.313 | 0.756 | 0.082 | 0.508 | 0.614 |
| T90 (%) | 0.113 | 0.705 | 0.485 | − 0.393 | − 2.631 | 0.012 | 0.363 | 2.548 | 0.015 | − 0.352 | − 2.559 | 0.014 |
| Mean SpO2 (%) | − 0.128 | − 0.757 | 0.454 | 0.331 | 2.040 | 0.048 | − 0.370 | − 2.454 | 0.019 | 0.282 | 1.883 | 0.067 |
| ODI (events/hour) | 0.193 | 1.019 | 0.316 | − 0.323 | − 1.08 | 0.096 | 0.128 | 0.688 | 0.496 | − 0.112 | − 0.622 | 0.538 |
*Adjusted by age, sex, body mass index, history of hypertension, and smoking.
AHI apnea/hypopnea index, LVGLS left ventricular global longitudinal strain, GCW global constructive work, GWE global work efficiency and GWW global wasted work, Mean SpO2 mean oxygen saturation, ODI oxygen desaturation index, T90 percentage of sleep time below 90% oxygen saturation.