Table 4. Effect of pericardiectomy on polysomnography and sleep questionnaires.
| Variables | Pre (n = 25) | Post (n = 25) | p |
|---|---|---|---|
| Total sleep time (min) | 350 (323–388.7) | 368 (347.2–398.2) | 0.199 |
| Sleep efficiency (%) | 91.7 (87.2–95.8) | 90.5 (76.6–92.6) | 0.086 |
| S1 (%) | 9.3 (6.3–16.2) | 8.4 (5.8–13.6) | 0.503 |
| S2 (%) | 55.4 (46.8–61.3) | 48.5 (42.3–59.3) | 0.475 |
| S3 (%) | 17.4±9.2 | 15±6.9 | 0.309 |
| REM (%) | 16±7.9 | 15.6±5.8 | 0.840 |
| AHI (events/h) | 15.6 (8.3–31.7) | 14.6 (5.8–29.9) | 0.253 |
| Obstructive | 0.8 (0–1.4) | 0.5 (0–3.4) | 0.217 |
| Central | 0.2 (0–1.4) | 0.2 (0–0.7) | 0.138 |
| Mixed | 0 (0–0.4) | 0 (0–0.2) | 0.610 |
| Hypopnea | 9.8 (6.35–20.1) | 10.8 (4.9–16.6) | 0.278 |
| Mean oxygen saturation (%) | 94.4±1.9 | 94.8±1.6 | 0.321 |
| Minimal oxygen saturation (%) | 85.6±4.7 | 85.5±4.6 | 0.689 |
| Oxygen saturation <90% (min) | 0.7(0–6.1) | 0.9 (0–3.7) | 0.862 |
| Sleep questionnaires | |||
| Epworth | 7.6±3.6 | 6.5±4.3 | 0.239 |
| Pittsburgh | 7.8±4.1 | 4.7±3.7 | <0.001 |
Data with normal distribution are presented as the mean ± standard deviation. Data with abnormal distribution are presented as the median and interquartile range. REM: rapid eye movement; AHI: apnea-hypopnea index.