2023
Review of the role of the endogenous opioid and melanocortin systems in the restless legs syndrome
Walters A, Li Y, Koo B, Ondo W, Weinstock L, Champion D, Afrin L, Karroum E, Bagai K, Spruyt K. Review of the role of the endogenous opioid and melanocortin systems in the restless legs syndrome. Brain 2023, 147: 26-38. PMID: 37633259, PMCID: PMC10796165, DOI: 10.1093/brain/awad283.Peer-Reviewed Original ResearchConceptsRestless legs syndromeMu-opioid receptorsRLS patientsEndogenous opioidsLegs syndromeOpioid receptorsSerum ironΒ-endorphinMelanocortin systemIdiopathic restless legs syndromeRLS-like symptomsPeriodic limb movementsLow serum ironWild-type miceSensory changesMelanocyte stimulating hormoneReceptor blockersSerum ferritinAutopsy studyStriatal dopamineAdrenocorticotropic hormoneStimulating hormoneDopaminergic systemMouse modelTherapeutic efficacyDevelopment and validation of a model predicting mild stroke severity on admission using electronic health record data
Waddell K, Myers L, Perkins A, Sico J, Sexson A, Burrone L, Taylor S, Koo B, Daggy J, Bravata D. Development and validation of a model predicting mild stroke severity on admission using electronic health record data. Journal Of Stroke And Cerebrovascular Diseases 2023, 32: 107255. PMID: 37473533, DOI: 10.1016/j.jstrokecerebrovasdis.2023.107255.Peer-Reviewed Original ResearchConceptsInitial stroke severityStroke severityElectronic health record dataHealth record dataSevere strokeIschemic strokeStroke careSample patientsMortality risk stratificationRecord dataVeterans Affairs hospitalMild stroke severityMultiple logistic regressionObservational cohortStroke outcomeIndependent predictorsRisk stratificationEHR data elementsPrimary analysisLogistic regressionStrokeValidation sampleSeverityPotent modifierEHR data
2022
Re-equip with opioids instead of dopamine agonists for the treatment of augmentation
Koo B. Re-equip with opioids instead of dopamine agonists for the treatment of augmentation. Sleep 2022, 45: zsac115. PMID: 35556146, DOI: 10.1093/sleep/zsac115.Peer-Reviewed Original Research
2020
Hypothyroidism in restless legs syndrome
Ahmed N, Kandil M, Elfil M, Jamal A, Koo BB. Hypothyroidism in restless legs syndrome. Journal Of Sleep Research 2020, 30: e13091. PMID: 32483857, DOI: 10.1111/jsr.13091.Peer-Reviewed Original ResearchConceptsRestless legs syndromeLegs syndromeRLS severityHigh prevalenceInternational RLS Study Group Severity ScaleHypothyroid participantsHypothyroidism prevalenceRLS FoundationRLS pathophysiologyRLS sufferersRLS prevalenceHypothyroid subjectsThyroid diseaseHypothyroidismSeverity ScalePrevalenceLine registryStudy objectiveSyndromePotential research participantsBiological mechanismsSeverityParticipantsPersonsHyperthyroidismImplications of the Gut Microbiome in Parkinson's Disease
Elfil M, Kamel S, Kandil M, Koo BB, Schaefer SM. Implications of the Gut Microbiome in Parkinson's Disease. Movement Disorders 2020, 35: 921-933. PMID: 32092186, DOI: 10.1002/mds.28004.Peer-Reviewed Original ResearchConceptsParkinson's disease patientsDisease patientsParkinson's diseaseMotor symptomsNervous systemEnteric nervous systemGut microbiome dysbiosisGut microbiome changesDifferent body systemsRelease of neurotoxinsCentral nervous systemCommon neurodegenerative disorderNormal gut microbiomeΑ-synuclein aggregatesNonmotor manifestationsAutoimmune responseNeuroprotective factorsAutopsy studyDopaminergic neuronsSubstantia nigraPathophysiologic changesMicrobiome dysbiosisMotor featuresGastrointestinal systemSystemic circulation
2018
Suicidal thought and behavior in individuals with restless legs syndrome
Para KS, Chow CA, Nalamada K, Kakade VM, Chilakamarri P, Louis ED, Koo BB. Suicidal thought and behavior in individuals with restless legs syndrome. Sleep Medicine 2018, 54: 1-7. PMID: 30529070, DOI: 10.1016/j.sleep.2018.09.019.Peer-Reviewed Original ResearchConceptsRestless legs syndromeInternational RLS Study Group Severity ScaleLifetime suicidal ideationLifetime depression historySuicidal ideationDepression historyLegs syndromeControl participantsBrief Lifetime Depression ScaleCambridge-Hopkins RLS questionnairePotential demographic confoundersRisk of suicideStepwise logistic regressionRLS sufferersRLS questionnaireRLS diagnosisRLS severityDepression ScaleSuicidal Behaviors QuestionnaireLifetime depressionSeverity ScaleDemographic confoundersSuicidal thoughtsLogistic regressionDepressionRestless legs syndrome and periodic limb movements during sleep in the Multi-Ethnic Study of Atherosclerosis
Doan TT, Koo BB, Ogilvie RP, Redline S, Lutsey PL. Restless legs syndrome and periodic limb movements during sleep in the Multi-Ethnic Study of Atherosclerosis. Sleep 2018, 41: zsy106. PMID: 29860522, PMCID: PMC6093310, DOI: 10.1093/sleep/zsy106.Peer-Reviewed Original ResearchConceptsRestless legs syndromePrevalence of RLSConcurrent restless legs syndromePeriodic limb movementsMulti-Ethnic StudyLegs syndromeObesity statusOdds of RLSLimb movementsPrevalence of PLMSCommunity-based sampleRace/ethnicityRLS symptomsClinical criteriaAdjusted modelPLMSStudy participantsPrevalenceOlder individualsCross-sectional dataAtherosclerosisSexSyndromeWhite participantsSleepDemoralization in Parkinson disease
Koo BB, Chow CA, Shah DR, Khan FH, Steinberg B, Derlein D, Nalamada K, Para KS, Kakade VM, Patel AS, de Figueiredo JM, Louis ED. Demoralization in Parkinson disease. Neurology 2018, 90: e1613-e1617. PMID: 29618626, PMCID: PMC5931805, DOI: 10.1212/wnl.0000000000005425.Peer-Reviewed Original ResearchConceptsDisease Rating ScaleParkinson's diseasePD cohortPatient Health Questionnaire-9 scoreOutpatient movement disorder clinicYounger ageUnified Parkinson's Disease Rating ScaleParkinson's Disease Rating ScaleMovement Disorders ClinicPart III scoreStepwise logistic regressionOverall cohortMotor dysfunctionDisorders ClinicDiagnostic criteriaTreatment approachesScale scoreLogistic regressionRating ScaleCohortControl participantsMarital statusPsychosomatic researchDepressed individualsDepression
2017
Polysomnographic phenotypes and their cardiovascular implications in obstructive sleep apnoea
Zinchuk AV, Jeon S, Koo BB, Yan X, Bravata DM, Qin L, Selim BJ, Strohl KP, Redeker NS, Concato J, Yaggi HK. Polysomnographic phenotypes and their cardiovascular implications in obstructive sleep apnoea. Thorax 2017, 73: 472. PMID: 28935698, PMCID: PMC6693344, DOI: 10.1136/thoraxjnl-2017-210431.Peer-Reviewed Original ResearchMeSH KeywordsAcute Coronary SyndromeAgedCardiovascular DiseasesCluster AnalysisCross-Sectional StudiesFemaleHumansIschemic Attack, TransientLongitudinal StudiesMaleMiddle AgedMortalityPhenotypePolysomnographyProportional Hazards ModelsRisk AssessmentSeverity of Illness IndexSleep Apnea, ObstructiveStrokeConceptsObstructive sleep apnoeaCardiovascular outcomesPolysomnographic featuresSleep apnoeaPolysomnographic dataIncident transient ischemic attackUS Veteran cohortTransient ischemic attackAcute coronary syndromeAdverse cardiovascular outcomesPeriodic limb movementsOSA severity classificationPolysomnographic phenotypeCoronary syndromeIschemic attackCardiovascular implicationsOSA phenotypesOSA evaluationPathophysiological domainsPoor sleepMild/Patient clustersVeteran cohortSurvival analysisCombined outcome
2016
Periodic leg movements during sleep: phenotype, neurophysiology, and clinical significance
Ferri R, Koo BB, Picchietti DL, Fulda S. Periodic leg movements during sleep: phenotype, neurophysiology, and clinical significance. Sleep Medicine 2016, 31: 29-38. PMID: 28341521, DOI: 10.1016/j.sleep.2016.05.014.Peer-Reviewed Original ResearchConceptsRestless legs syndromePeriodic leg movementsLeg movementsLeg motor activityLegs syndromePathophysiological correlatesClinical correlatesObjective findingsClinical significanceClinical conditionsNeurophysiologic aspectsCurrent evidencePLMSMotor phenomenaMotor activityAge groupsTypical phenotypeSleepRecent findingsCurrent knowledgeFurther researchCorrelatesFindingsPhenotypeScoringThe Association between Nocturnal Cardiac Arrhythmias and Sleep-Disordered Breathing: The DREAM Study.
Selim BJ, Koo BB, Qin L, Jeon S, Won C, Redeker NS, Lampert RJ, Concato JP, Bravata DM, Ferguson J, Strohl K, Bennett A, Zinchuk A, Yaggi HK. The Association between Nocturnal Cardiac Arrhythmias and Sleep-Disordered Breathing: The DREAM Study. Journal Of Clinical Sleep Medicine 2016, 12: 829-37. PMID: 26951420, PMCID: PMC4877315, DOI: 10.5664/jcsm.5880.Peer-Reviewed Original ResearchConceptsSleep-disordered breathingNocturnal cardiac arrhythmiasIntraventricular conduction delayApnea-hypopnea indexCardiac arrhythmiasTwo-fold oddsModerate-severe sleep-disordered breathingSeverity of SDBSevere sleep-disordered breathingComplex ventricular ectopyMultiple cardiovascular comorbiditiesObstructive respiratory eventsClinic-based populationCross-sectional analysisCardiovascular comorbiditiesSDB patientsVentricular ectopySDB severityRespiratory eventsUnadjusted oddsSupraventricular tachycardiaCardiovascular diseaseArrhythmia subtypesArrhythmia riskConduction delayRestless Legs Syndrome and Depression: Effect Mediation by Disturbed Sleep and Periodic Limb Movements
Koo BB, Blackwell T, Lee HB, Stone KL, Louis ED, Redline S, Group O. Restless Legs Syndrome and Depression: Effect Mediation by Disturbed Sleep and Periodic Limb Movements. American Journal Of Geriatric Psychiatry 2016, 24: 1105-1116. PMID: 27526989, PMCID: PMC5241001, DOI: 10.1016/j.jagp.2016.04.003.Peer-Reviewed Original ResearchConceptsSevere restless legs syndromeRestless legs syndromePeriodic limb movementsDepressive symptomsLegs syndromeSleep disturbancesMild restless legs syndromeFurther adjustmentAssociation of RLSLimb movementsCardiovascular risk factorsApnea-hypopnea indexBody mass indexPotential mediatorsCross-sectional analysisEffect sizeDopaminergic medicationMass indexOsteoporotic fracturesPLMS indexDisturbed sleepRisk factorsGDS scoresPhysical activitySleep efficiencyObservational Study of Obstructive Sleep Apnea in Wake-Up Stroke: The SLEEP TIGHT Study
Koo BB, Bravata DM, Tobias LA, Mackey JS, Miech EJ, Matthias MS, Stahl SM, Sico JJ, Fragoso C, Williams LS, Lampert R, Qin L, Yaggi HK. Observational Study of Obstructive Sleep Apnea in Wake-Up Stroke: The SLEEP TIGHT Study. Cerebrovascular Diseases 2016, 41: 233-241. PMID: 26811929, DOI: 10.1159/000440736.Peer-Reviewed Original ResearchMeSH KeywordsAgedBiomarkersBlood PressureBlood Pressure Monitoring, AmbulatoryBrain IschemiaChi-Square DistributionCholesterol, LDLConnecticutCross-Sectional StudiesFemaleHumansIndianaIschemic Attack, TransientLogistic ModelsMaleMiddle AgedOdds RatioOxygenPolysomnographyPrevalenceRandomized Controlled Trials as TopicRisk FactorsSeverity of Illness IndexSex FactorsSleepSleep Apnea, ObstructiveStrokeSympathetic Nervous SystemWakefulnessConceptsObstructive sleep apneaDiastolic blood pressureSevere obstructive sleep apneaLow-density lipoproteinBlood pressureSleep apneaSerum catecholaminesAmbulatory blood pressure monitoringBaseline diastolic blood pressureMean body mass indexB-type natriuretic peptideHigher diastolic blood pressureMore oxygen desaturationTransient ischemic attackIschemic stroke patientsAmbulatory blood pressureHistory of strokeBody mass indexC-reactive proteinBlood pressure monitoringOxygen desaturation eventsGender-stratified analysesCross-sectional analysisIschemic attackOSA frequency
2015
The Determining Risk of Vascular Events by Apnea Monitoring (DREAM) study: design, rationale, and methods
Koo BB, Won C, Selim BJ, Qin L, Jeon S, Redeker NS, Bravata DM, Strohl KP, Concato J, Zinchuk AV, Yaggi HK. The Determining Risk of Vascular Events by Apnea Monitoring (DREAM) study: design, rationale, and methods. Sleep And Breathing 2015, 20: 893-900. PMID: 26642771, DOI: 10.1007/s11325-015-1254-3.Peer-Reviewed Original ResearchConceptsCardiovascular outcomesVascular eventsSleep architecturePrognostic modelRetrospective observational cohort studyMain primary outcomeMiddle-aged veteransTransient ischemic attackAcute coronary syndromeObservational cohort studyResultsThe study populationCongestive heart failureSleep-disordered breathingVA Patient Treatment FileVital Status filesPatient Treatment FileComputerized patient record systemVeterans Affairs centersPost-traumatic stress disorderIschemic attackCoronary syndromeCohort studySecondary outcomesComposite endpointGlycemic controlQuality measures for the care of adult patients with restless legs syndrome.
Trotti LM, Goldstein CA, Harrod CG, Koo BB, Sharon D, Zak R, Chervin RD. Quality measures for the care of adult patients with restless legs syndrome. Journal Of Clinical Sleep Medicine 2015, 11: 293-310. PMID: 25700882, PMCID: PMC4346652, DOI: 10.5664/jcsm.4550.Peer-Reviewed Original ResearchConceptsRestless legs syndromeAccuracy of diagnosisAdult patientsLegs syndromeTreatment complicationsSymptom severityCare of patientsCommon sleep disorderEvidence-based treatmentsPotential side effectsQuality measure developmentRLS managementIron storesSleep disordersControl disordersDiagnostic criteriaSide effectsBetter outcomesRoutine assessmentAmerican AcademySleep medicinePatientsOutcomesSeverityComplications
2014
Periodic Limb Movements During Sleep and Prevalent Hypertension in the Multi-Ethnic Study of Atherosclerosis
Koo BB, Sillau S, Dean DA, Lutsey PL, Redline S. Periodic Limb Movements During Sleep and Prevalent Hypertension in the Multi-Ethnic Study of Atherosclerosis. Hypertension 2014, 65: 70-77. PMID: 25287399, PMCID: PMC4268086, DOI: 10.1161/hypertensionaha.114.04193.Peer-Reviewed Original ResearchConceptsSystolic blood pressurePLMS-arousal indexPeriodic limb movementsPrevalent hypertensionBlood pressureOverall cohortPLMS indexArousal indexObserved systolic blood pressureLimb movementsCardiovascular risk factorsBlood pressure outcomesApnea-hypopnea indexCommunity-dwelling menBody mass indexType/doseMulti-Ethnic StudyRace/ethnicityAntihypertensive medicationsPLMS frequencyDiastolic BPMass indexPressure outcomesRisk factorsSBP valuesDoes poor sleep quality affect skin ageing?
Oyetakin‐White P, Suggs A, Koo B, Matsui M, Yarosh D, Cooper K, Baron E. Does poor sleep quality affect skin ageing? Clinical And Experimental Dermatology 2014, 40: 17-22. PMID: 25266053, DOI: 10.1111/ced.12455.Peer-Reviewed Original ResearchConceptsPoor sleep qualityTransepidermal water lossSleep qualityPoor sleepersGood sleepersGood quality sleepersPoor quality sleepersHealthy Caucasian womenSkin barrier functionSelf-perceived satisfactionExtrinsic skin agingMultiple physiological systemsCaucasian womenEye circlesSkin healthClinical toolIntrinsic skinSkin barrierBarrier functionBarrier recoveryIntrinsic agingSkin agingSkin functionStandardized photosErythema
2013
Characteristics of Wake-up Stroke
Tanimoto A, Mehndiratta P, Koo BB. Characteristics of Wake-up Stroke. Journal Of Stroke And Cerebrovascular Diseases 2013, 23: 1296-1299. PMID: 24361192, DOI: 10.1016/j.jstrokecerebrovasdis.2013.10.021.Peer-Reviewed Original ResearchConceptsIschemic strokeCholesterol profileRisk factorsNon-WUS patientsStroke risk factorsDisease mechanismsWUS patientsBerlin questionnaireFrequent snoringSleep apneaMedical historyLipid profileSleep characteristicsStrokeStroke characteristicsDemographic informationPatientsAfrican AmericansQuestionnaireApneaSnoringSeverity
2011
Restless legs syndrome: relationship between prevalence and latitude
Koo BB. Restless legs syndrome: relationship between prevalence and latitude. Sleep And Breathing 2011, 16: 1237-1245. PMID: 22210354, DOI: 10.1007/s11325-011-0640-8.Peer-Reviewed Original ResearchAssociation of Incident Cardiovascular Disease With Periodic Limb Movements During Sleep in Older Men
Koo BB, Blackwell T, Ancoli-Israel S, Stone KL, Stefanick ML, Redline S, Group F. Association of Incident Cardiovascular Disease With Periodic Limb Movements During Sleep in Older Men. Circulation 2011, 124: 1223-1231. PMID: 21859975, PMCID: PMC3265562, DOI: 10.1161/circulationaha.111.038968.Peer-Reviewed Original ResearchConceptsCause cardiovascular diseaseCoronary heart diseasePeripheral arterial diseaseIncident cardiovascular diseasePeriodic limb movementsArterial diseaseCardiovascular diseaseCerebrovascular diseaseHeart diseasePLMS frequencyRelative hazardCommunity-dwelling elderly menConventional cardiovascular risk factorsPeripheral arterial disease eventsLimb movementsElderly male cohortCardiovascular risk factorsBody mass indexProportional hazards regressionRisk of incidentPrevalent hypertensionCardiovascular riskMass indexStudy cohortHazards regression