Research Article
Cystatin C Levels in Middle-Aged Patients with Obstructive Sleep Apnea Syndrome
Table 2
Comparison of sleep characteristics between OSAS patients and controls.
| | | OSAS patients (AHI > 5/h)
| Control group (AHI < 5/h)
| |
| | Recording time (min) | 366.95 ± 62.54 | 381.40 ± 20.68 | 0.121 | | TST (min) | 310.28 ± 69.40 | 291.95 ± 55.46 | 0.366 | | N1 (%) | 20.50 ± 19.44 | 23.03 ± 14.97 | 0.643 | | N2 (%) | 65.60 ± 14.50 | 53.93 ± 9.05 | 0.003 | | N3 (%) | 6.44 ± 7.26 | 11.14 ± 8.67 | 0.133 | | REM (%) | 8.91 ± 6.77 | 11.91 ± 10.19 | 0.390 | | RDI | 54.83 ± 29.91 | 2.54 ± 1.11 | <0.001 | | Aver. SpO2 (%) | 89.69 ± 3.23 | 93.8 ± 2.34 | <0.001 | | Min SpO2 (%) | 69.06 ± 11.40 | 88.50 ± 3.74 | <0.001 | | T < 90% (%) | 38.42 ± 26.65 | 0.75 ± 1.53 | <0.001 | | Arousal index | 40.62 ± 21.49 | 14.34 ± 10.60 | <0.001 | | Sleep efficiency (%) | 81.80 ± 15.05 | 76.55 ± 13.87 | 0.293 | | ESS score | 11.05 ± 5.54 | 9.70 ± 4.11 | 0.378 |
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AHI: apnoea-hypopnoea index, Aver. SpO2: average oxyhaemoglobin saturation during sleep, ESS: Epworth sleepiness scale, Min SpO2: minimum oxyhaemoglobin saturation during sleep, N1: sleep stage 1, N2: sleep stage 2, N3: sleep stage 3, OSAS: obstructive sleep apnea syndrome, RDI: respiratory disturbance index, REM: rapid eye movement, TST: total sleep time, and T < 90%: time with oxyhaemoglobin saturation <90%.
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