Table 2.
Preoperative and postoperative PSG parameters.
| Parameter | Preoperative values | Postoperative values | P value |
|---|---|---|---|
| Respiratory disturbances | |||
| AHI (/h) | 44.9 (30.8–63.7) | 29.15 (11.1–3.65) | < 0.001 |
| OAI (/h) | 12.2 (5.1–29.4) | 4 (0.5–15.2) | < 0.001 |
| CAI (/h) | 1.1 (0.2–2.95) | 0.65 (0–2.15) | 0.09 |
| AI (/h) | 16.5 (5.6–35.3) | 6.4 (1.2–17.3) | < 0.001 |
| HI (/h) | 24.9 (14.5–29.75) | 13.65 (6.9–24.95) | 0.007 |
| AHI REM sleep (/h) | 44.1 (26.25–70.1) | 21.1 (6–52.8) | 0.002 |
| AHI NREM sleep (/h) | 42.15 (31.45–62.95) | 27.55 (9.55–43.9) | < 0.001 |
| AI REM sleep (/h) | 18 (6.4–34.15) | 5.3 (0–22) | < 0.001 |
| AI NREM sleep (/h) | 17.6 (6.7–35.05) | 5.2 (1.05–16.45) | 0.002 |
| HIREM sleep (/h) | 19.55 (11.9–39.6) | 11.3 (2.5–24.7) | 0.07 |
| HI NREM sleep (/h) | 23 (12.5–29.4) | 15.5 (6.6–25.7) | 0.11 |
| AHI supine position (/h) | 49.15 (36.1–71) | 29.65 (9.3–47.9) | < 0.001 |
| Nocturnal pulseoxymetry | |||
| ODI (/h) | 43.6 (27.15–71) | 18. 25 (6.65–31.6) | < 0.001 |
| ODIREM sleep (/h) | 41.65 (31.55–78.05) | 15.8 (4–50.3) | < 0.001 |
| ODI NREM sleep (/h) | 41.1 (27.45–65.2) | 18 (4.85–33.05) | < 0.001 |
| Mean SpO2 (%) | 93 (91–94) | 95 (93–96) | < 0.001 |
| Minimal SpO2 (%) | 76 (67.5–82) | 83.5 (81–90) | < 0.001 |
| Time with SpO2 < 90% (min.) | 46.85 (14.75–91.9) | 2.75 (0.05–20.4) | < 0.001 |
| Mean HR (beats/min.) | 69 (61.75–75.5) | 61.1 (56.9–65.3) | < 0.001 |
| Minimal HR (beats/min.) | 50 (42–56) | 51 (47.1–56) | 0.17 |
| Maximal HR (beats/min.) | 127.5 (109–154) | 109.5 (102–121.3) | 0.054 |
| Sleep architecture | |||
| Sleep efficiency (%) | 73.35 (64.05–87.4) | 86.65 (70.7–94.95) | 0.016 |
| Sleep latency (min.) | 24 (11.9–35.1) | 17.25 (10–24.25) | 0.11 |
| REM sleep latency (min.) | 75.75 (61–114.75) | 75 (55–110) | 0.65 |
| NREM 1 sleep (%) | 22.5 (15.25–29) | 26.55 (21.4–33.25) | 0.015 |
| NREM 2 sleep (%) | 44.25 (35.9–50.45) | 45.95 (38.3–53.05) | 0.55 |
| NREM 3 sleep (%) | 19.15 (12.35–23.35) | 13 (7.5–20) | 0.003 |
| REM sleep (%) | 10 (5.55–14.6) | 11.15 (7.45–15.05) | 0.50 |
| Respiratory arousals (/h) | 16.8 (9.1–35.2) | 6.7 (3.2–12.6) | < 0.001 |
| Spontaneous arousals (/h) | 9.7 (5.95–14.5) | 12 (6.3–22.2) | 0.37 |
| Arousals index (/h) | 36.85 (17.55–54.3) | 23.8 (13.45–45.45) | 0.030 |
| Snoring (% of sleep time) | 21.6 (15–31.1) | 4.45 (0.15–12.15) | < 0.001 |
AI, apnea index; AHI, apnea–hypopnea index; CAI, central apnea index; HI, hypopnea index; HR, heart rate; NREM, non-rapid eye movement sleep; OAI, obstructive apnea index; ODI, oxygen desaturation index; REM, rapid eye movement sleep ;SpO2, hemoglobin oxygen saturation.