0000000000715472

AUTHOR

Melissa Garcia

showing 5 related works from this author

Evaluation of the postural stability of elderly persons using time domain signal analysis

2012

A force platform is widely used in the evaluation of postural stability in man. Although an abundance of parameters are typically retrieved from force platform data, no uniform analysis of the data has been carried out. In general, the signal analysis does not analyze the underlying postural event, i.e., whether the signal consists of several small corrections or large excursions. In the present work, we studied the postural stability of 4589 elderly persons from Iceland on a force platform under visual and non-visual conditions during stance on a solid surface. We analyzed the internal relationship between frequently used time domain variables. In addition, we conducted a factor analysis u…

Aged 80 and overMaleSignal processingTime FactorsGeneral NeuroscienceWork (physics)PostureOpen-loop controllerStationary pointSignalSensory SystemsArticleOtorhinolaryngologyControl theoryPostural BalanceHumansForce platformFemaleNeurology (clinical)Time domainPsychologyFactor Analysis StatisticalPostural BalanceSimulationAged
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Genetic determinants of heel bone properties: genome-wide association meta-analysis and replication in the GEFOS/GENOMOS consortium

2014

Quantitative ultrasound of the heel captures heel bone properties that independently predict fracture risk and, with bone mineral density (BMD) assessed by X-ray (DXA), may be convenient alternatives for evaluating osteoporosis and fracture risk. We performed a meta-analysis of genome-wide association (GWA) studies to assess the genetic determinants of heel broadband ultrasound attenuation (BUA; n = 14 260), velocity of sound (VOS; n = 15 514) and BMD (n = 4566) in 13 discovery cohorts. Independent replication involved seven cohorts with GWA data (in silico n = 11 452) and new genotyping in 15 cohorts (de novo n = 24 902). In combined random effects, meta-analysis of the discovery and repli…

MaleOncologyHeelBone densityOsteoporosisGenome-wide association studyCohort StudiesFractures Bonequantitative ultrasoundBone DensityGenetics (clinical)riskUltrasonographyAged 80 and overGeneticsmedicine.diagnostic_testAssociation Studies Articlesphenotypesta3141General MedicineMiddle Aged3. Good healthmedicine.anatomical_structureosteoporosis diagnostic radiologic examination roentgen rays ultrasonography bone mineral density fractures calcaneus chromosomes genes genome heel longevity single nucleotide polymorphism sound genetics chromosome 7q31 genotype determination genome-wide association study attenuation osteoporotic fracture risk/dk/atira/pure/sustainabledevelopmentgoals/good_health_and_well_beingFemalewomenAdultmusculoskeletal diseasesmedicine.medical_specialtyx-ray absorptiometrySingle-nucleotide polymorphismdensitometryBiologyPolymorphism Single NucleotidecalcaneusYoung AdultSDG 3 - Good Health and Well-beingInternal medicineGeneticsmedicineHumansGenetic Predisposition to DiseaseMolecular BiologyDual-energy X-ray absorptiometryVLAGAgedGlobal NutritionWereldvoedingta1184ta3121medicine.diseaseosteoporosisCalcaneusGenetic epidemiologyfractureOsteoporosismineral densityCalcaneusGenome-Wide Association Study
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Birth Size and Brain Function 75 Years Later

2014

BACKGROUND: There are several lines of evidence pointing to fetal and other early origins of diseases of the aging brain, but there are no data directly addressing the hypotheses in an older population. We investigated the association of fetal size to late-age measures of brain structure and function in a large cohort of older men and women and explored the modifying effect of education on these associations. METHODS: Within the AGES (Age Gene/Environment Susceptibility)-Reykjavik population-based cohort (born between 1907 and 1935), archived birth records were abstracted for 1254 men and women who ∼75 years later underwent an examination that included brain MRI and extensive cognitive ass…

GerontologyAdultMalecognitionmedicine.medical_specialtyBirth weightPopulationIcelandBrain Structure and FunctionArticleCohort StudiesMedicineAging brainBirth WeightHumanseducationWastingAgedAged 80 and overeducation.field_of_studyeducationbusiness.industryObstetricsagingBrainMiddle AgedConfidence intervalPopulation SurveillancePediatrics Perinatology and Child HealthCohortFemalemedicine.symptombusinessbrain atrophyCohort studyFollow-Up Studiesbirth size
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Genetic associations at 53 loci highlight cell types and biological pathways relevant for kidney function

2016

Reduced glomerular filtration rate defines chronic kidney disease and is associated with cardiovascular and all-cause mortality. We conducted a meta-analysis of genome-wide association studies for estimated glomerular filtration rate (eGFR), combining data across 133,413 individuals with replication in up to 42,166 individuals. We identify 24 new and confirm 29 previously identified loci. Of these 53 loci, 19 associate with eGFR among individuals with diabetes. Using bioinformatics, we show that identified genes at eGFR loci are enriched for expression in kidney tissues and in pathways relevant for kidney development and transmembrane transporter activity, kidney structure, and regulation o…

0301 basic medicineNephrologyGenetics and Molecular Biology (all)estimated glomerular filtration rateestimated glomerular filtration rate chronic kidney disease genetic determinantsGeneral Physics and AstronomyKidney developmentGenome-wide association studyBiochemistrySettore MED/14 - NEFROLOGIARenal InsufficiencyChronicGeneticsAGEN Consortiumddc:616education.field_of_studyKidneyStage renal-diseaseMultidisciplinaryGenome-wide associationCHARGe-Heart Failure GroupGene Expression Regulation; Genome-Wide Association Study; Genotype; Humans; Renal Insufficiency Chronic; Genetic Predisposition to Disease; Biochemistry Genetics and Molecular Biology (all); Chemistry (all); Physics and Astronomy (all)QChemistry (all)MetaanalysisGene Expression Regulation; Genetic Predisposition to Disease; Genome-Wide Association Study; Genotype; Humans; Renal Insufficiency Chronic/geneticsBiological sciencesSerum creatininemedicine.anatomical_structureEfficientRonyons -- FisiologiaHypertensionICBP ConsortiumTransmembrane transporter activitygenetic association loci kidney functionCARDIOGRAMHumanmedicine.medical_specialtyGenotypeSciencePopulationRenal functionECHOGen ConsortiumReplicationBiologyEnvironmentResearch SupportGeneral Biochemistry Genetics and Molecular BiologyN.I.H.genetic determinants03 medical and health sciencesPhysics and Astronomy (all)GENOME-WIDE ASSOCIATION ; FALSE DISCOVERY RATES ; STAGE RENAL-DISEASE ; SERUM CREATININE ; METAANALYSIS ; VARIANTS ; INDIVIDUALS ; POPULATION ; RISK ; HYPERTENSIONKidney functionResearch Support N.I.H. ExtramuralInternal medicineMD MultidisciplinarymedicineGeneticsJournal ArticleHumanseGFRcrea; eGFRcysGenetic Predisposition to Diseaseddc:610GenetikRenal Insufficiency ChronicMortalityeducationddc:613Biochemistry Genetics and Molecular Biology (all)urogenital systemIndividualsExtramuralGeneral Chemistryta3121medicine.diseaseR1030104 developmental biologyGene Expression RegulationBiochemistry Genetics and Molecular Biology (all); Chemistry (all); Physics and Astronomy (all)570 Life sciences; biologyGenèticachronic kidney diseaseKidney diseaseGenome-Wide Association StudyMeta-Analysis
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Persistence of the effect of birth size on dysglycaemia and type 2 diabetes in old age: AGES-Reykjavik Study

2012

We studied the effect of birth size on glucose and insulin metabolism among old non-diabetic individuals. We also explored the combined effect of birth size and midlife body mass index (BMI) on type 2 diabetes in old age. Our study comprised 1,682 Icelanders whose birth records included anthropometrical data. The same individuals had participated in the prospective population-based Reykjavik Study, where BMI was assessed at a mean age of 47 years, and in the AGES-Reykjavik Study during 2002 to 2006, where fasting glucose, insulin and HbA₁c were measured and homeostasis model assessment for the degree of insulin resistance (HOMA-IR) calculated at a mean age of 75.5 years. Type 2 diabetes was…

Blood GlucoseMaleAgingmedicine.medical_specialtyPediatricsBirth weightPopulationIcelandType 2 diabetesWeight GainArticleBody Mass IndexInsulin resistanceDiabetes mellitusInternal medicinemedicineBirth WeightHumansInsulinsyntymäpainoProspective StudieseducationAgedAged 80 and overGlucose tolerance testeducation.field_of_studydiabetesmedicine.diagnostic_testbusiness.industryIncidenceagingGeneral MedicineGlucose Tolerance TestMiddle Agedmedicine.diseaseLow birth weightikääntyminenEndocrinologyDiabetes Mellitus Type 2Population SurveillanceDisease ProgressionFemaleInsulin ResistanceGeriatrics and Gerontologymedicine.symptombusinessBody mass indexbirth sizeFollow-Up StudiesAGE
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