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1、StudyareaandsubjectsTakatsuki-city,with26-1%ofinhabitantsaged>60years,isthecorecityinthenorthofOsakaPrefecture;therearefivewelfarecentersfortheaged,whereorganizedactivitiessuchastabletennis,dancingandsinging,areavailableforpersonalenrichment.Oursubjectswereco
2、mposedofpeoplefromthesecenterswhodidnottakepartinanytherapyorinterventionforosteoporosis,atotalof374individuals(134men,240women)aged60years.UltrasoundparametersofboneandphysicalfactorswereevaluatedinthesesubjectsduringtheperiodMay-June2005.(调杳地区的特点，抽样过程，样本人群数
3、量，有效应答率，调查日期等)MeasurementsofultrasoundparametersofbonehealthandphysicalfactorsUltrasoundparametersofboneweremeasuredintheright-heelwithA-1000EXPRESSQUSbonedensitometer(GELunar,Madison,WI,USA).Thevaluesofbroadbandultrasoundattenuation(BUA),speedofsound(SOS)and
4、stiffnessindex(SI)derivedfromBUAandSOS,10wereobtained.SincecombinationsofBUAandSOSimprovedtheprecision/SItendedtobethebestpredictoramongQUSparameters125andwasselectedastheindicatorofbonehealth/因变量Y的测量方法、定义、指标选取/分组等)Bodycomponents-fatmass(kg)andmusclemass(kg)-
5、weremeasuredwithaBC-118DBodyCompositionAnalyzer(TanitaCorp.,Tokyo,Japan)withthesubjectsinthestandingpositionduring10:00〜11:30amineachperformanceasreportedbyTanimoto.16Forthisevaluation,fatmassandmusclemasswereadjustedbytheheightsquared(nr).Handgripstrengthwas
6、determinedinthedominanthandwithaGripStrengthDynamometer(TakeiScientificInstruments,Niigata,Japan).KenzLifecorderEXelectronicpedometer(KenkouCorp.,Suzuken,Japan)wasattachedtothesubject^beltfor1weektomonitordailyphysicalactivities.Estimatedtotalcaloricexpenditu
7、reduringmovementandthetotalnumberofwalkingstepswererecordeddaily.Dailyphysicalactivityandwalkingstepswerecalculatedastheaveragedailyenergyexpenditure(kcal/day)andaveragenumberofdailywalkingsteps(steps/day)over1weekrespectively.Tomeasurewalkingspeed,participan
8、tswereaskedtowalkstraightaheadfor11metersattheirmaximumandusualspeeds.Walkingspeedwasderivedfromthemiddlefivemeters?7MaximumbiteforcewasdeterminedwithDentalPrescaleOccluzerFPD-707(Fujifil
