title: [Serum adiponectin levels in patients with obstructive sleep apnea-hypopnea syndrome].
abstract: OBJECTIVE
  To explore the changes of serum adiponectin levels in patients with obstructive sleep apnea-hypopnea syndrome (OSAHS).
  
  
  METHODS
  Polysomnography was performed in 71 obese OSAHS patients (obese OSAHS group), 21 OSAHS patients without obesity (non-obese OSAHS group), 26 obese controls (obese group) and 22 normal healthy adults (control group). In both the obese OSAHS group and obese group, the body mass index (BMI) was higher than 25 and there was no significant difference in BMI. Serum adiponectin levels were measured by radioimmunoassay.
  
  
  RESULTS
  The serum adiponectin level in the control group [(8.9 +/- 0.6) mg/L] was significantly higher than those in the obese group [(7.1 +/- 1.3) mg/L, P < 0.05], the non-obese OSAHS group [(5.4 +/- 0.6) mg/L, P < 0.01] and the obese OSAHS group [(5.0 +/- 1.0) mg/L, P < 0.01] respectively. The serum adiponectin level was significantly lower in both the obese OSAHS group and the non-obese OSAHS group (all P < 0.05). The serum adiponectin levels between the obese OSAHS group and the non-obese OSAHS group showed no statistical difference (P > 0.05). In the obese OSAHS patients and the obese patients serum adiponectin levels were negatively correlated with AHI (r = -0.78, P < 0.01), BMI (r = -0.21, P < 0.05), waist circumference (r = -0.36, P < 0.01), and neck circumference (r = -0.42, P < 0.01), but positively correlated with minimal pulse oxygen saturation (r = 0.48, P < 0.01).
  
  
  CONCLUSIONS
  Serum adiponectin levels were significantly lower in OSAHS patients than in the normal control and the obese patients. In addition to increased waist and neck circumferences, OSAHS may contribute to the decreased serum adiponectin level.
authors.affiliation: Department of Respiratory Medicine, First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China.
authors.forename: Xi-long
authors.initials: XL
authors.lastname: Zhang
authors.forename: Qiu-sheng
authors.initials: QS
authors.lastname: Huang
authors.forename: Mao
authors.initials: M
authors.lastname: Huang
authors.forename: Kai-sheng
authors.initials: KS
authors.lastname: Yin
mesh_terms: D052242:Adiponectin; D000328:Adult; D005260:Female; D006801:Humans; D036341:Intercellular Signaling Peptides and Proteins / Q000097:blood*; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000097:blood; D017286:Polysomnography; D012720:Severity of Illness Index; D020181:Sleep Apnea, Obstructive / Q000097:blood* / Q000150:complications
chemical_list: D052242:Adiponectin; D036341:Intercellular Signaling Peptides and Proteins