Table 2.
Comparison of polysomnographic data between the three groups
| Index | hypertensive group (n=71) | normotensive group (n=43) | P value |
|---|---|---|---|
| TST (min) | 420.05±78.49 | 395.95±64.99 | 0.094 |
| Sleep efficiency (%) | 85.40 (77.30-93.50) | 84.00 (78.00-91.90) | 0.490 |
| Sleep latency (min) | 19.00 (4.50-38.00) | 20.00 (1.50-35.20) | 0.806 |
| REM sleep latency (min) | 137.00 (89.60-232.70) | 137.00 (84.50-203.50) | 0.524 |
| MAI (times/h) | 33.20 (20.40-47.90) | 20.30 (14.00-35.10) | 0.102 |
| AHI (times/h) | 60.80 (40.80-70.60) | 25.30 (12.20-54.70) | <0.001 |
| REM-AHI (times/h) | 54.30 (48.00-72.00) | 36.70 (12.60-48.00) | <0.001 |
| NREM-AHI (times/h) | 61.00 (39.60-70.40) | 24.70 (9.80-55.00) | <0.001 |
| REM% | 12.66±6.04 | 14.37±5.98 | 0.146 |
| MSpO2 (%) | 93.00 (89.00-94.00) | 95.00 (93.00-96.00) | <0.001 |
| REM-MSpO2 (%) | 90.00 (83.00-93.00) | 94.00 (91.00-96.00) | <0.001 |
| NREM-MSpO2 (%) | 93.00 (89.00-94.00) | 94.00 (93.00-95.00) | <0.001 |
| LSaO2 (%) | 67.00 (57.00-75.00) | 80.00 (69.00-85.00) | <0.001 |
| T90% (%) | 22.44 (10.53-45.90) | 3.28 (0.47-15.01) | <0.001 |
| REM-T90% (%) | 37.52 (14.05-66.90) | 5.03 (0.10-30.39) | <0.001 |
| NREM-T90% (%) | 21.80 (9.17-45.23) | 2.63 (0.30-14.73) | <0.001 |
Note: Compared to the normal blood pressure group, significant difference as P<0.05. TST: total sleep time; MAI: Micro arousal index; AHI: apnea hypopnea index; REM-AHI: apnea hypopnea index during REM sleep; NREM-AHI: apnea hypopnea index during non REM sleep; REM%: percentage of total sleep time in REM sleep period; MSpO2: mean pulse oxygen saturation; REM-MSpO2: mean pulse oxygen saturation in REM sleep period; NREM-MSpO2: mean pulse oxygen saturation in non REM sleep period; LSaO2: lowest arterial oxygen saturation; T90%: percentage of total sleep time in non REM sleep period; REM-T90%: the percentage of total sleep time when the arterial oxygen saturation is less than 90% in REM sleep; NREM-T90%: the percentage of total sleep time when the arterial oxygen saturation is less than 90% in non REM sleep.