title: [The impact of obstructive sleep apnea hypopnea syndrome on glucose metabolism].
abstract: OBJECTIVE
  To study the influence of obstructive sleep apnea hypopnea syndrome (OSAHS) on glucose metabolism and comprehensively analyze its related factors.
  
  
  METHODS
  A total of 180 snoring patients were recruited in Sleep Disorder Center of Nanfang Hospital of Southern Medical University between January 2010 to June 2011. There were 140 patients with OSAHS and 40 subjects without OSAHS. All patients underwent both a full polysomnography (PSG) and plasma glucose measure, including fasting plasma glucose (FPG) and oral glucose tolerance test (OGTT). The FPG, 1-hour post-challenge glucose (1 hPG) and 2-hour post-challenge glucose (2 hPG) were respectively compared in patients with different apnea hypopnea index (AHI), the lowest saturation of pulse oximetry (SpO₂) and sleep architecture.
  
  
  RESULTS
  The incidence of glucose metabolism disorders was higher in patients with OSAHS than that of those without (diabetes: 21.4% vs 5.0%; prediabetes: 34.3% vs 25.0%). The FPG, 1 hPG and 2 hPG in patients with different AHI was significantly different respectively (all P < 0.01), so as in patients with different lowest oxygen saturation (all P < 0.01). Post-load glucose levels of patients with different AHI were still significantly different after adjustment for neck circumference (1 hPG: P = 0.004; 2 hPG: P = 0.048). FPG, 1 hPG and 2 hPG were associated with AHI (r = 0.167, 0.277, 0.196, all P < 0.05), mean SpO₂(r = -0.154, -0.214, -0.182, all P < 0.05) and the lowest SpO₂(r = -0.224, -0.231, -0.159, all P < 0.05); While FPG, 1 hPG and 2 hPG were not significantly associated with N1 + N2, N3 and rapid eye movement (REM) sleeps (all P > 0.05).
  
  
  CONCLUSIONS
  The risk of glucose metabolism disorders increased with the severity of OSAHS. Compared with fasting glucose, post-load glucose was more affected by OSAHS independent of obesity. Compared with sleep architecture or sleep efficiency, glucose metabolism disorders seem to be associated with hypoxia caused by OSAHS.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Feng
authors.forename: Dongying
authors.initials: D
authors.lastname: Guo
authors.forename: Hui
authors.initials: H
authors.lastname: Peng
authors.forename: Danqing
authors.initials: D
authors.lastname: Li
authors.forename: Ting
authors.initials: T
authors.lastname: Xu
authors.forename: Bo
authors.initials: B
authors.lastname: Pang
authors.forename: Qian
authors.initials: Q
authors.lastname: Jiang
authors.affiliation: Department of Sleep Disorder Center, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China; Email: ltpnet@126.com.
authors.forename: Taoping
authors.initials: T
authors.lastname: Li
mesh_terms: D001786:Blood Glucose / Q000032:analysis; D016022:Case-Control Studies; D002681:China / Q000453:epidemiology; D044882:Glucose Metabolism Disorders / Q000097:blood / Q000453:epidemiology* / Q000209:etiology; D005951:Glucose Tolerance Test; D006801:Humans; D000860:Hypoxia / Q000473:pathology; D015994:Incidence; D009765:Obesity / Q000097:blood / Q000503:physiopathology*; D017286:Polysomnography; D012720:Severity of Illness Index; D012890:Sleep / Q000502:physiology; D012891:Sleep Apnea Syndromes; D020181:Sleep Apnea, Obstructive / Q000097:blood / Q000150:complications / Q000503:physiopathology*; D012913:Snoring
chemical_list: D001786:Blood Glucose