title: High prevalence of hypogonadotropic hypogonadism in men referred for obesity treatment.
abstract: BACKGROUND
  Obesity can be associated with biochemical evidence of isolated hypogonadotropic hypogonadism (IHH) in men. Prevalence and severity of IHH in obese men are not exactly known.
  
  
  OBJECTIVE
  To assess the prevalence of IHH in obese men.
  
  
  METHODS
  Cross-sectional study of 160 obese men, BMI >30 kg/m2, who applied for medical or surgical treatment of obesity in a general teaching hospital.
  
  
  METHODS
  Total and calculated free testosterone (TT and FT) in relation to body mass index (BMI).
  
  
  RESULTS
  Mean age of the study population was 43.3 +/- 0.8 years (mean +/- SEM), BMI ranged from 30.0 to 65.7 kg/m2. TT and FT levels were inversely related to BMI (-0.48, p<0.0001). Total testosterone was subnormal in 57.5% and free testosterone in 35.6% of the subjects. The group of men with IHH was more obese, had higher Hba IC levels and had a 2.6 higher risk for cardiovascular disease. Decreased libido and erectile dysfunction were 7.1 and 6.7 times as common in IHH than in eugonadal obese men.
  
  
  CONCLUSIONS
  Reduced T levels, well into the hypogonadal range, are common in male obesity. Assessment of its clinical implications, and a search for the best mode of treatment are warranted.
authors: Department of Internal Medicine, Rijnstate Hospital, Arnhem, the Netherlands.
authors: J
authors: J
authors: Hofstra
authors: S
authors: S
authors: Loves
authors: B
authors: B
authors: van Wageningen
authors: J
authors: J
authors: Ruinemans-Koerts
authors: I
authors: I
authors: Jansen
authors: H
authors: H
authors: de Boer
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D015992:Body Mass Index; D002318:Cardiovascular Diseases / Q000209:etiology; D003430:Cross-Sectional Studies; D007172:Erectile Dysfunction / Q000209:etiology; D006801:Humans; D007006:Hypogonadism / Q000097:blood / Q000453:epidemiology / Q000209:etiology* / Q000503:physiopathology; D007989:Libido; D008297:Male; D008875:Middle Aged; D009426:Netherlands / Q000453:epidemiology; D009765:Obesity / Q000097:blood / Q000150:complications* / Q000453:epidemiology / Q000503:physiopathology; D015995:Prevalence; D012307:Risk Factors