Dippers (29) Non-dippers (57)
Sleep study characteristics    
Mild to moderate OSA 12/29(41.4%) 25/57 (43.8%)
Severe OSA 17/29 (58.6%) 32/57 (56.2%)
AHI, events/h 46.37± 25.55 55.37± 32.10
p-0.303
Average desaturation index 14.29± 13.53 13.22± 14.73
p-0.723
Sleep duration, min 229.96± 43.08 204.41± 65.22
p-0.159
Time with SpO2 <90%, % 39.92± 34.89 63.17± 30.32
p-0.020
Hypnogram    
Stage I,min 15.09± 21.19 14.85± 22.82
p-0.502
Stage II,min 42.35± 14.25 36.89± 17.14
p-0.204
Stage III,min 32.75± 21.78 31.53± 19.35
p-0.819
Stage IV,min 9.30± 15.56 8.0± 12.71
p-0.508
REM, % 9.95± 20.3 5.8± 11.96
p-0.166
Arousal index, events/h 36.90± 23.29 45.28± 26.29
p-0.212
Table 2: Sleep study characteristics in dippers/non-dippers.