Table 1. Patient characteristics.
| Total Sample (n = 152) | No OSA (n = 60) | OSA (n = 92) | P value * | |
| Age (years) | 48±9 | 46±8 | 49±8 | 0.02 |
| Males (%) | 62.5 | 55 | 67 | 0.13 |
| Caucasians (%) | 74 | 70 | 77 | 0.34 |
| Body mass index (kg/m2) | 32.3±3.4 | 32.2±3.8 | 32.3±3.2 | 0.76 |
| Hypertension (%) | 66.4 | 61.7 | 69.6 | 0.38 |
| Diabetes (%) | 7.9 | 9.1 | 8.2 | 1.00 |
| Number of MetS criteria (n) | 3 (3−4) | 3 (3−4) | 4 (3−4) | <0.01 |
| Apnea-hypopnea index (events/hour) | 19.6 (7.1−39.0) | 5.0 (2.6−8.8) | 34.7 (25.0−54.3) | <0.001 |
| Lowest oxygen saturation (%) | 83 (74−87) | 87 (85−90) | 77 (69−84) | <0.001 |
| Total sleep time oxygen saturation <90% (%) | 3.0 (0.2−10.0) | 0.3 (0−1.8) | 8.9 (2.7−24.5) | <0.001 |
| Epworth sleepiness scale | 10 (8−11) | 9 (8−10) | 10 (8−12) | 0.03 |
| Excessive daytime sleepiness,† n (%) | 47 (30.9) | 14 (23.3) | 33 (35.9) | 0.11 |
*For comparisons between MetS patients with and without OSA. †Epworth sleepiness scale score >10.
MetS: Metabolic Syndrome. OSA: Obstructive Sleep Apnea. Variables with normal distribution are expressed as mean±SD. Variables with skewed distribution are presented as median (interquartile range).