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Table 2 Sleep variables of study population

From: Using PaCO2 values to grade obesity-hypoventilation syndrome severity: a retrospective study

 

Mild OHSa (n = 46)

Moderate OHSb (n = 24)

Severe OHSc (n = 14)

AHI, events/h

65.4 ± 17.8

73.8 ± 16.5

70.7 ± 17.6

TST90, %

37.8 ± 21.2

55.5 ± 19.4*

86.3 ± 24.5**§

Mean SaO2, %

89.3 ± 3.3

86.6 ± 3.9*

84.1 ± 2.8§

SaO2 nadir, %

68.5 ± 11.7

63.4 ± 12.5

59.2 ± 10.7#

  1. Data are presented as mean values ± SD unless otherwise indicated
  2. OHS Obesity-Hypoventilation Syndrome, AHI apnea-hypopnea index, TST90 total sleep time with oxyhemoglobin saturation below 90%, SaO 2 arterial oxygen saturation
  3. a46 mmHg ≤ PaCO2 ≤ 50 mmHg
  4. b51 mmHg ≤ PaCO2 ≤ 55 mmHg
  5. cPaCO2 ≥ 56 mmHg
  6. # P < 0.05 severe vs mild OHS; *P < 0.01 moderate vs mild OHS; **P < 0.01 severe vs moderate OHS; § P < 0.01 severe vs mild OHS
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Multidisciplinary Respiratory Medicine

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