Table 2.
Nighttime respiratory characteristics of the study population according to the presence of prediabetes.
| Prediabetes (n = 311) |
Control Group (n = 655) |
p | |
|---|---|---|---|
| Time of evaluation (hs) | 7.2 (6.4;8.0) | 7.2 (6.5;8.0) | 0.684 |
| AHI (events/h) | 12.7 (6.1;24.3) | 9.5 (4.2;19.6) | <0.001 |
| Apnea index (events/h) | 1.6 (0.4;5.8) | 1.3 (0.4;4.3) | 0.159 |
| Hypopnea index (events/h) | 8.4 (4.0;14.9) | 6.0 (2.7;12.6) | <0.001 |
| OSA, n (%) | 243 (78.1) | 458 (69.9) | 0.007 |
| Mild OSA, n (%) | 108 (34.8) | 227 (34.6) | 0.142 |
| Moderate OSA, n (%) | 76 (24.4) | 138 (21.0) | 0.060 |
| Severe OSA, n (%) | 57 (18.5) | 89 (13.6) | 0.010 |
| Median SpO2 level (%) | 92 (91;93) | 93 (92;94) | <0.001 |
| Minimum SpO2 level (%) | 82 (77;85) | 83 (80;87) | <0.001 |
| CT90 (%) | 14 (4;33) | 6 (1;24) | <0.001 |
| ODI4% (events/h) | 14 (8;27) | 11 (5;21) | 0.001 |
| Epworth Sleepiness Scale score * | 4 (2;5) | 3 (2;5) | 0.740 |
Information is displayed as a median (interquartile range) or n (percentage). AHI: Apnea–hypopnea index; OSA: obstructive sleep apnea; SpO2: oxygen saturation; CT90: cumulative time percentage with SpO2 < 90%; ODI4%: number of 4% oxygen desaturation index; * The Epworth Sleepiness Scale was completed by 80.2% of participants.