title: Higher serum osteocalcin is associated with lower abdominal aortic calcification progression and longer 10-year survival in elderly men of the MINOS cohort.
abstract: BACKGROUND
  Abdominal aortic calcification (AAC) is an indicator of cardiovascular risk, especially in the diseases characterized by insulin resistance such as type 2 diabetes. Osteocalcin is a bone-secreted hormone that favors insulin sensitivity and insulin secretion.
  
  
  OBJECTIVE
  We investigated whether total serum osteocalcin level at baseline is associated with AAC progression and 10-year all-cause mortality in elderly men.
  
  
  METHODS
  We assessed 774 men aged 51-85 years from the MINOS cohort who had osteocalcin measurement and lumbar spine radiographs at baseline. They were followed-up prospectively for 10 years. Among them, 615 patients had a follow-up radiograph at 3.5 or 7 years.
  
  
  METHODS
  Serum total osteocalcin was measured with an immunoradiometric assay on morning fasting serum collected at baseline. Kauppila's AAC score was assessed from lumbar spine radiographs. AAC progression rate was calculated as the difference between AAC on the last available radiograph and AAC at baseline divided by the follow-up time. Death status was collected over 10 years.
  
  
  RESULTS
  In multivariate analysis, higher baseline total osteocalcin was associated with lower AAC progression rate (odds ratio = 0.74 [0.57-0.97] per 10 ng/mL variation; P = 0.029). At the 10-year follow-up, there were 599 men alive (77%), 181 dead (23%), and 2 lost to follow-up. Higher osteocalcin was associated with lower 10-year all-cause mortality (hazard ratio = 0.62 [0.44-0.86] per 10 ng/mL variation; P = 0.005).
  
  
  CONCLUSIONS
  Higher baseline total osteocalcin concentrations were associated with lower AAC progression rate and lower mortality. These data suggest that osteocalcin level might be an independent indicator of cardiovascular risk and global health in elderly Caucasian men.
authors: Service de Rhumatologie, Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche 1033, Pavillon F, Hôpital Edouard Herriot, 5 Place d'Arsonval, 69003 Lyon, France. cyril.confavreux@inserm.fr
authors: Cyrille B
authors: CB
authors: Confavreux
authors: Pawel
authors: P
authors: Szulc
authors: Romain
authors: R
authors: Casey
authors: Stéphanie
authors: S
authors: Boutroy
authors: Annie
authors: A
authors: Varennes
authors: Nicolas
authors: N
authors: Vilayphiou
authors: Joelle
authors: J
authors: Goudable
authors: Roland D
authors: RD
authors: Chapurlat
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001012:Aorta, Abdominal / Q000473:pathology*; D001018:Aortic Diseases / Q000401:mortality* / Q000473:pathology*; D002114:Calcinosis / Q000401:mortality* / Q000473:pathology*; D015331:Cohort Studies; D003924:Diabetes Mellitus, Type 2 / Q000401:mortality; D018450:Disease Progression; D005500:Follow-Up Studies; D006801:Humans; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging / Q000378:metabolism; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D015675:Osteocalcin / Q000097:blood*; D016016:Proportional Hazards Models; D011859:Radiography; D012307:Risk Factors
chemical_list: D015675:Osteocalcin