Elevated LH/Normal T Levels in Older Men - Natural History, Risk, Clinical Features

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Elevated LH with normal testosterone (T) suggests compensated dysregulation of the gonadal axis. We describe the natural history, risk factors and clinical parameters associated with the development of high LH (HLH, LH>9.4 U/L) in ageing men with normal T (T≥10.5 nmol/L, 274 ng/dl).


  • A 4.3 year prospective observational study of 3,369 community-dwelling European men aged 40-79 years.
  • Participants were classified as: incident (i) HLH (n=101, 5.2%); persistent (p) HLH (n=128, 6.6%); reverted (r) HLH (n=46, 2.4%); or persistent normal LH (pNLH, n=1667, 85.8%).
  • Potential predictors and changes in clinical features associated with iHLH and rHLH were analysed using regression models.

RESULTS:

  • Age greater than 70 years, diabetes, chronic pain pre-degree education, and low physical activity predicted development of HLH.
  • Younger age, 40-49 years, and non-smoking predicted recovery from HLH.
  • Men with iHLH developed erectile dysfunction, poor health, cardiovascular disease (CVD) and cancer more frequently than pNLH men.
  • In pHLH men, co-morbidities, including CVD, developed more frequently, and cognitive and physical function deteriorated more, than in pNLH men.
  • Men with HLH developed primary hypogonadism more frequently than NLH men. Men with rHLH experienced a small rise in BMI.

Elevation of LH with normal T is predicted by multiple factors, reverts frequently and is not associated with unequivocal evidence of androgen deficiency. High LH is a biomarker for deteriorating health in aged men who tend to develop primary hypogonadism.

"Elevated Luteinising Hormone despite Normal Testosterone Levels in older Men - Natural History, Risk Factors, and Clinical Features," Clinical Endocrinology, 2017 Novenmber 27, https://www.ncbi.nlm.nih.gov/pubmed/29178359/
 
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