OsteoporosisOsteoporosis, PostmenopausalBone DensityBone Density Conservation AgentsOsteoporotic FracturesFractures, BoneDiphosphonatesAbsorptiometry, PhotonFractures, SpontaneousAlendronateBone and BonesBone Diseases, MetabolicSpinal FracturesTeriparatideEtidronic AcidBone RemodelingBone ResorptionFemur NeckLumbar VertebraeHip FracturesRisk FactorsRaloxifeneFemurCalcaneusOsteoclastsCalcium, DietaryGlucocorticoidsQuestionnairesOsteoblastsVitamin DSelective Estrogen Receptor ModulatorsSpinePrevalenceCalcitoninDepressionTreatment OutcomeSymptom AssessmentOsteogenesisEstrogen Replacement TherapyOsteocalcinHipRANK LigandOvariectomyParathyroid HormoneCross-Sectional StudiesSeverity of Illness IndexBone DiseasesPostmenopauseAge FactorsAccidental FallsIliumProspective StudiesOsteoprotegerinAlkaline PhosphataseFollow-Up StudiesDensitometryMenopauseTime FactorsRadiusCollagen Type IQuality of LifeSpinal InjuriesRetrospective StudiesOsteomalaciaSex FactorsMass ScreeningBiological MarkersEstrogensJaw DiseasesBehavioral SymptomsMetacarpusCalciumForearm InjuriesLongitudinal StudiesPsychiatric Status Rating ScalesRisk AssessmentBack PainCohort StudiesTibiaBone DevelopmentFemoral Neck FracturesMineralsFractures, CompressionComorbidityThoracic VertebraeAgingMenCathepsin KHip JointCalcification, PhysiologicEndocrine System DiseasesOsteonecrosisPainHormone Replacement TherapyThiophenesAnabolic AgentsUnited StatesAffective SymptomsCase-Control StudiesVitamin D Deficiency