title: Preliminary Report on the Investigation of the Association Between BPPV and Osteoporosis Using Biomarkers.
abstract: OBJECTIVE
  To test the hypothesis that levels of a BPPV biomarker, otolin-1, correlate with those of osteoporosis markers, aminoterminal propeptide of protocollagen type I (P1NP), and aminoterminal telopeptides of collagen (NTX), thus further supporting a link between the two diseases.
  
  
  METHODS
  Prospective pilot clinical trial (Level of Evidence: 2b).
  
  
  METHODS
  Postmenopausal women with BPPV.
  
  
  METHODS
  Diagnostic.
  
  
  METHODS
  Serum levels of otolin-1, P1NP, NTX, vitamin D, and calcium were examined in relation to each other, age, and DEXA scan T-scores.
  
  
  RESULTS
  There was a strong, negative correlation between T-scores and otolin-1 levels. Although P1NP and NTX levels were strongly correlated, neither had statistical correlations with otolin-1.
  
  
  CONCLUSIONS
  Despite a strong correlation between DEXA scan results and otolin-1 levels, there were no significant correlations between otolin-1 and P1NP or NTX. This suggests that the association between osteoporosis and BPPV is complex, but not likely to be causal. Although more work is needed to elucidate these relationships, this preliminary finding has important practical implications for BPPV in that proactive management of osteoporosis, per se, would not be expected to have benefits in management of BPPV.
authors.affiliation: Department of Surgery, Division of Otolaryngology-Head and Neck Surgery, University of Connecticut School of Medicine, Farmington, Connecticut, U.S.A.
authors.forename: Daniel
authors.initials: D
authors.lastname: Sacks
authors.forename: Kourosh
authors.initials: K
authors.lastname: Parham
mesh_terms: D015502:Absorptiometry, Photon; D000368:Aged; D000369:Aged, 80 and over; D065635:Benign Paroxysmal Positional Vertigo / Q000097:blood*; D015415:Biomarkers / Q000097:blood; D015519:Bone Density; D001851:Bone Diseases, Metabolic / Q000097:blood / Q000000981:diagnostic imaging; D002118:Calcium / Q000097:blood*; D024042:Collagen Type I / Q000097:blood*; D016326:Extracellular Matrix Proteins / Q000097:blood*; D005260:Female; D006801:Humans; D008875:Middle Aged; D015663:Osteoporosis, Postmenopausal / Q000097:blood* / Q000000981:diagnostic imaging; D010446:Peptide Fragments / Q000097:blood*; D010455:Peptides / Q000097:blood*; D010865:Pilot Projects; D011347:Procollagen / Q000097:blood*; D011446:Prospective Studies; D014807:Vitamin D / Q000031:analogs & derivatives* / Q000097:blood
chemical_list: D015415:Biomarkers; D024042:Collagen Type I; D016326:Extracellular Matrix Proteins; D010446:Peptide Fragments; D010455:Peptides; D011347:Procollagen; C052929:collagen type I trimeric cross-linked peptide; C449659:otolin-1; C047202:procollagen Type I N-terminal peptide; D014807:Vitamin D; C104450:25-hydroxyvitamin D; D002118:Calcium