title: A Romanian instrument to facilitate bone density measurement indication in postmenopausal women.
abstract: The aim of the study is to find and valid a clinical instrument which identifies the women that need a bone density measurement because of their high risk for osteoporosis.
  
  
  METHODS
  A number of 356 women were enrolled in this study. They filled in a study formular and their bone density was measured by DEXA exam (dual energy X-ray absorbtiometry) in the lumbar spine and proximal femur. Statistical correlations between the dependent variable minimal T-score and the other variables (clinical risk factors) were established. The most significant osteoporosis risk factor were included in a classification tree for the dependent variable minimal T-score with 5 splits, 5 independent splitting variables and 6 terminal knots.
  
  
  RESULTS
  The most significant osteoporosis predictors included in our classification tree are: current weight, decreasing of height, sedentary life, alcohol consumption, number of deliveries. In predicting osteoporosis, the classification tree has high values both for sensitivity and for specificity (88.2%, respectively 74.11%).The osteoporosis prevalence is very high (74.34%) within the group predicted as having osteoporosis (53.7% of all women). The osteoporosis prevalence was 11% within the group predicted as having osteopenia.
  
  
  CONCLUSIONS
  The classification tree facilitates a bone density measurement strategy and establishes the criteria for initiation of the treatment in high risk osteoporosis cases. It allows postponing the DEXA-exam for low risk women and selective measurement of the bone density for intermediar osteoporosis risk women.
authors.affiliation: Department of Internal Medicine and Rheumatology, "Ion Cantacuzino" Hospital, "Carol Davila" University of Medicine and Pharmacy, Bucharest, Romania. andreimartin68@yahoo.com
authors.forename: A
authors.initials: A
authors.lastname: Martin
authors.forename: M
authors.initials: M
authors.lastname: Bojincă
authors.forename: Mihaela
authors.initials: M
authors.lastname: Milicescu
authors.forename: L
authors.initials: L
authors.lastname: Macovei
authors.forename: Sorina
authors.initials: S
authors.lastname: Stoian
authors.forename: St
authors.initials: S
authors.lastname: Suţeanu
authors.forename: V
authors.initials: V
authors.lastname: Stoica
mesh_terms: D015502:Absorptiometry, Photon; D015519:Bone Density; D005260:Female; D005269:Femur; D006801:Humans; D008159:Lumbar Vertebrae; D008875:Middle Aged; D015663:Osteoporosis, Postmenopausal / Q000000981:diagnostic imaging* / Q000453:epidemiology; D015995:Prevalence; D012307:Risk Factors; D012383:Romania / Q000453:epidemiology; D012680:Sensitivity and Specificity