Table 1 Changes of major polysomnographic parameters in the 563 severe OSA patients before and after surgery
Characteristics | Mean (SD) | 95% CI for difference | P valuea | ||
|---|---|---|---|---|---|
Pre-operative | Post-operative | Difference | |||
ESS | 9.7 (4.7) | 7.8 (4.2) | − 2.0 (4.6) | − 2.4 to − 1.6 | < 0.001 |
BMI (kg/m2) | 27.4 (3.3) | 26.5 (3.2) | − 0.9 (1.7) | − 1.1 to − 0.8 | < 0.001 |
Sleep efficiency (%) | 83.7 (13.0) | 86.2 (12.6) | 2.5 (15.1) | 1.2 to 3.9 | < 0.001 |
N1 (%) | 55.9 (20.9) | 41.2 (21.6) | − 14.6 (25.4) | − 16.9 to − 12.3 | < 0.001 |
N2 (%) | 27.4 (18.4) | 38.3 (18.1) | 10.9 (21.6) | 8.9 to 12.8 | < 0.001 |
N3 (%) | 1.4 (3.9) | 2.1 (4.4) | 0.6 (5.0) | 0.2 to 1.1 | 0.006 |
REM (%) | 15.0 (7.0) | 18.2 (6.9) | 3.2 (8.6) | 2.4 to 4.1 | < 0.001 |
AHI (/hr.) | 57.6 (18.1) | 34.9 (31.5) | − 22.8 (32.9) | − 25.7 to − 19.8 | < 0.001 |
AHI in REM (/hr.) | 55.6 (38.6) | 35.3 (24.8) | − 20.3 (41.0) | − 24.0 to − 16.6 | < 0.001 |
Apnea, longest (sec.) | 59.0 (22.2) | 45.6 (33.4) | − 13.3 (32.2) | − 16.3 to − 10.3 | < 0.001 |
Hypopnea, longest (sec.) | 67.3 (30.6) | 81.6 (42.6) | 14.2 (49.9) | 9.6 to 18.9 | < 0.001 |
PO2 < 90% (%) | 16.4 (17.1) | 8.4 (13.7) | − 8.0 (15.1) | − 9.4 to − 6.6 | < 0.001 |
mO2 (%) | 93.6 (3.2) | 94.9 (2.2) | 1.3 (2.9) | 1.1 to 1.6 | < 0.001 |
LSAT (%) | 71.6 (12.2) | 79.5 (10.8) | 7.9 (11.5) | 6.8 to 8.9 | < 0.001 |
ODI (/hr.) | 46.3 (22.1) | 24.3 (22.3) | − 22.0 (23.2) | − 24.1 to − 19.9 | < 0.001 |
Arousal index (/hr.) | 47.7 (26.7) | 32.3 (24.7) | − 15.4 (31.3) | − 18.3 to − 12.5 | < 0.001 |
Snoring index (/hr.) | 394.2 (206.0) | 301.4 (224.0) | − 92.8 (272.3) | − 117.5 to − 68.1 | < 0.001 |