Factor Analysis, StatisticalPsychometricsDiseases in TwinsTwins, DizygoticModels, StatisticalModels, PsychologicalLongitudinal StudiesReproducibility of ResultsQuestionnairesTranslatingPrincipal Component AnalysisTranslationsCross-Cultural ComparisonQuality of LifePersonality InventoryPsychiatric Status Rating ScalesCross-Sectional StudiesLanguageSeverity of Illness IndexFood HabitsRisk FactorsPsychological TestsPatient SatisfactionSickness Impact ProfileOrganizational CultureQ-SortDiagnostic and Statistical Manual of Mental DisordersUruguaySelf EfficacyHealth Status IndicatorsSelf ConceptDisability EvaluationStudentsActivities of Daily LivingAnxietySelf-AssessmentChinaAdaptation, PsychologicalSex Factors