Ankle Brachial IndexAnklePeripheral Vascular DiseasesPeripheral Arterial DiseaseIntermittent ClaudicationBrachial ArteryLegArterial Occlusive DiseasesTibial ArteriesLower ExtremityIschemiaPhotoplethysmographyBlood Pressure DeterminationWalkingRisk FactorsPredictive Value of TestsBlood PressurePopliteal ArteryBody Mass IndexSeverity of Illness IndexUltrasonography, DopplerVascular PatencyFemoral ArteryUltrasonography, Doppler, DuplexCross-Sectional StudiesDiabetic AngiopathiesProspective StudiesFollow-Up StudiesExercise TestAtherosclerosisAngioplasty, BalloonRegional Blood FlowTime FactorsCardiovascular DiseasesTreatment OutcomeC-Reactive ProteinPrevalenceCohort StudiesChi-Square DistributionRisk AssessmentRetrospective StudiesMitotic IndexGlycemic IndexObesity