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Table 1 Demographic characteristics of OSA patients

From: More severe hypoxemia is associated with better subjective sleep quality in obstructive sleep apnea

Characteristics, (n = 156) Mean (SD)
Gender-male (n, %) 118 (75.6 %)
Age(years) 47.3(14.0)
BMI (Kg/m2) 27.3 (4.5)
Total sleep time (min) 355.0(61.8)
Sleep efficiency(%) 83.2(12.6)
Sleep latency(min) 14.3(19.7)
Stage I (%) 23.8(19.4)
Stage II (%) 51.3(13.5)
Stage III (%) 11.3(10.4)
Stage REM (%) 13.5(6.7)
AHI (/hour) 35.0(25.9)
Mean SpO2 (%) 94.7(2.4)
Mini SpO2 (%) 77.5(10.4)
ODI (/hour) 30.7(24.7)
T90 (second/hour) 445.6(571.5)
Arousal index (/hour) 31.8(23.4)
PLMI (/hour) 0.4(0.8)
PSQI (scale) 9.4(4.3)
ESS (scale) 11.2(5.3)
SF-36 physical (scale) 46.8(9.2)
SF-36 mental (scale) 41.3(11.6)
CESD (n = 36) 18.0(11.0)
HADS-depression(n = 120) 6.5(3.8)
Median SpO2 (%) 94.9(2.6)
Lowest 5 % SpO2 (%) 81.4(9.4)
Highest 5 % SpO2 (%) 98.2(0.9)
Hightest 5 % SpO2 minus Median SpO2 3.28(2.28)
Median SpO2 minus Lowest 5 % SpO2 (%) 13.5(8.3)
  1. Abbreviations: BMI body mass index; REM rapid eye movement sleep; AHI apnea-hypopnea index; Mean SpO2 mean saturation of total time in bed; Mini SpO2 minimum saturation of total time in bed; ODI oxygen desaturation index; T90 time spent with saturation < 90 %; PLMI periodic leg movement index; PSQI Pittsburgh sleep quality index; ESS Epworth sleepiness scale; SF-36 Physical, physical component score of short form 36; SF-36 Mental, mental component score of short form 36; CESD center for epidemiologic studies depression scale; HADS-depression depression component of Hospital Anxiety and Depression Scale; median SpO2 the median value of saturation of total sleep time; Lowest 5 % SpO2 averaged value from the lowest 5 % saturation of total sleep time; Highest 5 % SpO2, averaged value from the highest 5 % saturation of total sleep time; Highest% SpO2 minus Medium SpO2, the difference between Highest 5 % SpO2 and Medium SpO2; Median SpO2 minus Lowest 5 % SpO2, the difference between Median SpO2 and Lowest 5 % SpO2