title: [Diagnostic values of self-assessment tool for Asians for osteoporosis in aged men].
abstract: OBJECTIVE
  To evaluate the diagnostic values of osteoporosis self-assessment tool for Asians (OSTA) in aged men.
  
  
  METHODS
  Bone mineral density (BMD) was measured by dual energy X-ray absorptiometry (DXA) in 382 male outpatients. Their data were collected. After excluding such influencing factors of BMD as diseases or drugs, they were divided into 3 groups according to the WHO osteoporosis diagnosis value or age. The correlation between OSTA index and BMD was analyzed by Spearman correlation. The concordance of OSTA and BMD were calculated and analyzed by a four-fold table.
  
  
  RESULTS
  The prevalence of osteoporosis was 9.42% and osteopenia 42.67%. Age increased gradually in the osteoporosis, osteopenia and normal bone mass groups. But OSTA index, BMD (including lumbar vertebrae L(1-4), femoral neck, trochanter and hip) and weight decreased gradually in those groups. The percent of normal bone mass decreased with advancing age. And the percentages were 60.68%, 51.97% and 33.33% respectively. Osteoporosis increased in the older group (> 80 years old) and the percentage was 24.64% accounting for 94.44% of all osteoporotic subjects. Judging by the OSTA index, the rate of low osteoporotic risk decreased with advancing age. But the rates of mid-risk and high-risk increased. The correlation coefficients of OSTA index and BMD in femoral neck, trochanter, hip and L(1-4) was 0.33, 0.28, 0.29 and 0.06 respectively. And the correlation between OSTA index and BMD had statistical significance except for L(1-4). The sensitivity, specificity, coincidence and Youden index of OSTA index with a T score cutoff of -1 of BMD were 56.28%, 64.48%, 60.21% and 0.21 respectively versus 86.11%, 57.80%, 60.47% and 0.44 with a T score cutoff of -2.5.
  
  
  CONCLUSIONS
  Correlation exists between OSTA index and BMD. The sensitivity, specificity and coincidence of OSTA index are excellent based upon the standard of BMD by DXA. It is a useful and simple diagnostic tool of osteoporosis.
authors.affiliation: Department of Elderly Endocrinology, General Hospital of PLA, Beijing 100853, China.
authors.forename: Min-yan
authors.initials: MY
authors.lastname: Liu
authors.forename: Chun-lin
authors.initials: CL
authors.lastname: Li
authors.forename: Yu
authors.initials: Y
authors.lastname: Pei
authors.forename: Yu-jun
authors.initials: YJ
authors.lastname: Xiao
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhang
authors.forename: Xiao-ling
authors.initials: XL
authors.lastname: Cheng
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D044466:Asian People; D015519:Bone Density; D006801:Humans; D008297:Male; D008875:Middle Aged; D010024:Osteoporosis / Q000175:diagnosis*; D018570:Risk Assessment; D016353:Self-Examination / Q000379:methods*; D012680:Sensitivity and Specificity