Table 2 Polysomnographic characteristics of obstructive sleep apnea patients.

From: Bone mineral density alteration in obstructive sleep apnea by derived computed tomography screening

 

Mild OSA

Moderate/severe OSA

p-value

N

77

97

 

AHI (events/h)

10.4 ± 2.7

35.7 ± 19.1

0.001

Men

53.3%

67%

0.11

Age (years)

58.9 ± 12.9

63.8 ± 9.9

0.007

BMI (kg/cm2)

30.1 ± 6.5

35.6 ± 32.2

0.111

Ar index (events/h)

26.8 ± 27.6

35.0 ± 21.3

0.037

Sleep efficiency (%)

82.8 ± 10.1

81.9 ± 13.8

0.657

Wake O2

95.7 ± 2.8

95.7 ± 3.0

0.866

T90 (%)

8.8 ± 14.8

15.1 ± 23.1

0.09

DI (events/h)

11.9 ± 5.3

29.4 ± 16.7

0.001

ESS (score)

9.3 ± 6.4

8.8 ± 9.7

0.774

  1. AHI apnea–hypopnea index, Ar index Arousal and Awakening Index, BMI Body Mass Index, ESS Epworth Sleepiness Scale, T90 percent sleeping time in which oxygen saturation was below 90%, DI desaturation index ≥ 3%. Values are mean ± SD.
  2. p-value was determined by an unpaired Student’s t-test.
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