title: The relationship between bone turnover markers and BMD decreasing rates in Chinese middle-aged women.
abstract: BACKGROUND
  The relationship between bone turnover markers (BTMs) and BMD decreasing rate (BDR) in Chinese women is unclear. Wu investigated the relationship between (BTMs) and BDR at various skeletal sites in Chinese middle-aged women.
  
  
  METHODS
  A cross-section study of 555 healthy Chinese women over 35-60years of age. BMD at posteroanterior spine, the left hip, and the left forearm were measured with a DXA. Levels of serum osteocalcin (OC), bone-specific alkaline phosphatase (BAP), cross-linked N-terminal telopeptides of type I collagen (sNTX) and total urinary deoxypyridinoline (uDPD) were determined.
  
  
  RESULTS
  BDR at various skeletal sites had significant negative correlation with serum OC(r=-0.395 to -0.530), BAP(r=-0.297 to -0.486), and sNTX(r=-0.207 to -0.272). After adjustment of age and weight, serum OC, BAP, and sNTX rather than total uDPD still exhibited significant correlations with BDR. Stepwise regression analyses showed that, serum OC and BAP were the significantly negative determinants of BDR. Between 4.7-27.7% and 1.2-16.1% of the changes in BDR were determined by serum OC and BAP, respectively. However, sNTX and total uDPD had no significant effect on BDR at various skeletal sites.
  
  
  CONCLUSIONS
  This study indicated the correlation between BTMs and early-stage BDR in Chinese middle-aged women and suggested that serum OC and BAP, rather than sNTX and total uDPD, are the key determining factors of early BMD decreases.
authors.affiliation: Department of Stomatology, Xiangya Hospital, Central South University, Changsha, Hunan, PR China.
authors.forename: Xiong-Wen
authors.initials: XW
authors.lastname: Zhou
authors.forename: Xi-Yu
authors.initials: XY
authors.lastname: Wu
authors.forename: Lin
authors.initials: L
authors.lastname: Luo
authors.forename: Li-Juan
authors.initials: LJ
authors.lastname: Guo
authors.forename: Ming-Xiang
authors.initials: MX
authors.lastname: Lei
authors.forename: Hong
authors.initials: H
authors.lastname: Zhang
authors.forename: Hui
authors.initials: H
authors.lastname: Xie
authors.forename: Yi-Qun
authors.initials: YQ
authors.lastname: Peng
authors.forename: Xian-Ping
authors.initials: XP
authors.lastname: Wu
authors.forename: Er-Yuan
authors.initials: EY
authors.lastname: Liao
mesh_terms: D000328:Adult; D015415:Biomarkers; D015519:Bone Density; D016723:Bone Remodeling; D002681:China; D005260:Female; D006801:Humans; D008875:Middle Aged
chemical_list: D015415:Biomarkers