title: Premature hair greying may predict reduced bone mineral density in Graves' disease.
abstract: BACKGROUND
  Premature hair greying has been associated with low bone mineral density (BMD), and it may be more frequent in Graves' disease.
  
  
  OBJECTIVE
  To determine whether premature greying is associated with reduced BMD in women with Graves' disease and in control women, and to examine whether premature greying is more common in Graves' disease.
  
  
  METHODS
  Premature greying (> 50% grey by 40 years) and BMD were determined in 44 women with a history of Graves' disease and 133 female controls referred for routine BMD measurement. Exclusion criteria included diseases or drugs known to affect BMD.
  
  
  RESULTS
  Mean Z and T scores at the lumbar spine were significantly lower (P < 0.04) in subjects with premature greying than in those not prematurely grey among women with Graves' disease, but not among control women. Multiple regression confirmed this difference between Graves' and control women (P = 0.041). There were no differences at other measurement sites. Of Graves' patients, 36% were prematurely grey compared with 25% of control women (P = 0.14).
  
  
  CONCLUSIONS
  Premature greying may be a weak marker for reduced BMD in women with a history of Graves' disease, but it is not a marker in normal women.
authors.affiliation: Department of Medicine, Cork University Hospital and University College Cork, Ireland.
authors.forename: A C
authors.initials: AC
authors.lastname: Leary
authors.forename: G
authors.initials: G
authors.lastname: Grealy
authors.forename: T M
authors.initials: TM
authors.lastname: Higgins
authors.forename: N
authors.initials: N
authors.lastname: Buckley
authors.forename: D G
authors.initials: DG
authors.lastname: Barry
authors.forename: J B
authors.initials: JB
authors.lastname: Ferriss
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D015519:Bone Density; D016022:Case-Control Studies; D016009:Chi-Square Distribution; D005260:Female; D006111:Graves Disease / Q000503:physiopathology*; D006200:Hair Color; D006801:Humans; D008875:Middle Aged; D015999:Multivariate Analysis; D012044:Regression Analysis