2024
Prevalence, Correlates, and Burden of Subthreshold PTSD in US Veterans.
Fischer I, Na P, Harpaz-Rotem I, Marx B, Pietrzak R. Prevalence, Correlates, and Burden of Subthreshold PTSD in US Veterans. The Journal Of Clinical Psychiatry 2024, 85 PMID: 39480145, DOI: 10.4088/jcp.24m15465.Peer-Reviewed Original ResearchConceptsSubthreshold posttraumatic stress disorderPosttraumatic stress disorderPosttraumatic stress disorder symptom clustersLifetime psychiatric disordersUS veteransUS military veteransSymptom-related distressStress disorderPsychiatric disordersSymptom clustersTreating veteransCriterion AMilitary veteransTraumatic eventsCognitive functionWorking case definitionMental healthCriterion FFunctional impairmentVeteransNationally representative sampleFunctional correlatesDisordersElevated oddsGreater oddsPsychological Factors, Physical Conditions, and Functioning Among US Veterans
Fischer I, Na P, Feldman D, Krist A, Kudler H, Jeste D, Pietrzak R. Psychological Factors, Physical Conditions, and Functioning Among US Veterans. JAMA Network Open 2024, 7: e2427382. PMID: 39120905, PMCID: PMC11316230, DOI: 10.1001/jamanetworkopen.2024.27382.Peer-Reviewed Original ResearchFunctional significance of posttraumatic growth in U.S. military veterans
Gower T, Fischer I, Tsai J, Kang H, Na P, Tedeschi R, Pietrzak R. Functional significance of posttraumatic growth in U.S. military veterans. Journal Of Affective Disorders 2024, 356: 267-273. PMID: 38614442, DOI: 10.1016/j.jad.2024.04.046.Peer-Reviewed Original ResearchConceptsPosttraumatic stress disorderPosttraumatic stress disorder symptomsPosttraumatic growthPsychosocial functioningTraumatic eventsTrauma-exposed U.S. veteransNational Health and ResilienceMale veteran samplePost-trauma functioningPattern of findingsRetrospective self-reportsU.S. military veteransVeteran sampleStress disorderVeterans StudyExamined relationsCross-sectional designMilitary veteransNationally representative sampleU.S. veteransAssociated with functionsPhysical functionClinical interventionsPsychosocial characteristicsVeterans
2022
Increased Admissions of Older Adults to Substance Use Treatment Facilities and Associated Changes in Admission Characteristics, 2000-2017.
Na PJ, Rosenheck R, Rhee TG. Increased Admissions of Older Adults to Substance Use Treatment Facilities and Associated Changes in Admission Characteristics, 2000-2017. The Journal Of Clinical Psychiatry 2022, 83 PMID: 35377564, DOI: 10.4088/jcp.21m13938.Peer-Reviewed Original ResearchConceptsSUD treatment facilitiesSubstance use disordersOlder adultsYoung adultsCocaine/General older adult populationTreatment Episode Data SetAdults 55 yearsOlder adult populationUse of alcoholClinical characteristicsPatient characteristicsAdmission ratesRelative decreaseAnnual admissionsGeneral populationUse disordersAdmissionMultivariate analysisNationwide dataAdult populationLogistic regressionCannabis useAdultsTreatment facilities
2021
Prevalence and Trends in Suicidal Behavior Among US Military Veterans During the COVID-19 Pandemic
Nichter B, Hill ML, Na PJ, Kline AC, Norman SB, Krystal JH, Southwick SM, Pietrzak RH. Prevalence and Trends in Suicidal Behavior Among US Military Veterans During the COVID-19 Pandemic. JAMA Psychiatry 2021, 78: 1218-1227. PMID: 34431973, PMCID: PMC8387942, DOI: 10.1001/jamapsychiatry.2021.2332.Peer-Reviewed Original ResearchConceptsUS military veteransCOVID-19 infectionCohort studySuicidal behaviorPast-year suicide ideationRisk factorsMilitary veteransPopulation-based prospective cohort studyCOVID-19 pandemicSuicide ideationSuicide attemptsProspective cohort studyLifetime posttraumatic stress disorderStrong risk factorCOVID-19 public health emergencyLow social supportPosttraumatic stress disorderPublic health emergencyAlcohol use disorder severityUS veteransNational HealthMAIN OUTCOMESuicide attempt historyVeterans StudyCOVID-19-related variablesPrevalence, risk and protective factors of alcohol use disorder during the COVID-19 pandemic in U.S. military veterans
Na PJ, Norman SB, Nichter B, Hill ML, Rosen MI, Petrakis IL, Pietrzak RH. Prevalence, risk and protective factors of alcohol use disorder during the COVID-19 pandemic in U.S. military veterans. Drug And Alcohol Dependence 2021, 225: 108818. PMID: 34171825, PMCID: PMC9758576, DOI: 10.1016/j.drugalcdep.2021.108818.Peer-Reviewed Original ResearchConceptsProbable alcohol use disorderAlcohol use disorderUse disordersU.S. military veteransHigh riskYounger ageProtective factorsLifetime substance use disorderUse severityMilitary veteransChronic alcohol use disorderIncident alcohol use disordersSubstance use disordersLow dispositional optimismCOVID-19 pandemicCOVID-related worryAlcohol use severityDrug use severityProspective cohortUS veteransHigh-risk sampleNational HealthGeneral populationLower riskAlcohol consumptionPosttraumatic Distress Symptoms and Their Response to Treatment in Adults With Prolonged Grief Disorder.
Na PJ, Adhikari S, Szuhany KL, Chen AZ, Suzuki RR, Malgaroli M, Robinaugh DJ, Bui E, Mauro C, Skritskaya NA, Lebowitz BD, Zisook S, Reynolds CF, Shear MK, Simon NM. Posttraumatic Distress Symptoms and Their Response to Treatment in Adults With Prolonged Grief Disorder. The Journal Of Clinical Psychiatry 2021, 82 PMID: 34000119, DOI: 10.4088/jcp.20m13576.Peer-Reviewed Original ResearchConceptsPosttraumatic stress symptomsPosttraumatic distress symptomsNonviolent deathsGrief disorderPosttraumatic stress disorderBereaved adultsPrimary diagnosisFunctional impairmentMixed-effects regressionPlaceboProlonged Grief DisorderGrief treatmentMajor life stressorsCitalopramSecondary analysisAntidepressant citalopramDistress symptomsStress disorderPoor functioningLife stressorsAdultsDisordersTreatmentStress symptomsSymptomsPrevalence, risk and protective factors associated with suicidal ideation during the COVID-19 pandemic in U.S. military veterans with pre-existing psychiatric conditions
Na PJ, Tsai J, Hill ML, Nichter B, Norman SB, Southwick SM, Pietrzak RH. Prevalence, risk and protective factors associated with suicidal ideation during the COVID-19 pandemic in U.S. military veterans with pre-existing psychiatric conditions. Journal Of Psychiatric Research 2021, 137: 351-359. PMID: 33756377, PMCID: PMC8545743, DOI: 10.1016/j.jpsychires.2021.03.021.Peer-Reviewed Original ResearchConceptsPre-existing psychiatric conditionsPsychiatric symptom severitySuicidal ideationPsychiatric conditionsPsychiatric symptomsSymptom severityCOVID-19Protective factorsCoronavirus disease 2019 (COVID-19) pandemicPast-year suicidal ideationCOVID-19 infectionDisease 2019 pandemicLifetime suicide attemptsU.S. military veteransMultivariable analysisNational HealthOlder veteransGeneral populationRepresentative cohortU.S. veteransVeterans StudySuicide attemptsOlder ageSuicide riskPsychosocial difficulties
2019
A systematic review of older adults’ request for or attitude toward euthanasia or assisted-suicide
Dransart D, Lapierre S, Erlangsen A, Canetto S, Heisel M, Draper B, Lindner R, Richard-Devantoy S, Cheung G, Scocco P, Gusmão R, De Leo D, Inoue K, De Techterman V, Fiske A, Hong J, Landry M, Lepage A, Marcoux I, Na P, Neufeld E, Ummel D, Winslov J, Wong C, Wu J, Wyart M. A systematic review of older adults’ request for or attitude toward euthanasia or assisted-suicide. Aging & Mental Health 2019, 25: 420-430. PMID: 31818122, DOI: 10.1080/13607863.2019.1697201.Peer-Reviewed Original ResearchConceptsOlder adultsConsistent predictorPhysical healthPass decisionsLow religiositySocial factorsSample characteristicsAttitudesCultural factorsAdultsResearch designLife decisionsDescriptive dataSocio-economic statusPredictorsFuture studiesMost studiesOutcome measuresFindingsEndorsementPhysician-assisted suicideQuantitative studySystematic reviewReligiosityDecisions
2018
The PHQ-9 Item 9 based screening for suicide risk: a validation study of the Patient Health Questionnaire (PHQ)−9 Item 9 with the Columbia Suicide Severity Rating Scale (C-SSRS)
Na PJ, Yaramala SR, Kim JA, Kim H, Goes FS, Zandi PP, Voort J, Sutor B, Croarkin P, Bobo WV. The PHQ-9 Item 9 based screening for suicide risk: a validation study of the Patient Health Questionnaire (PHQ)−9 Item 9 with the Columbia Suicide Severity Rating Scale (C-SSRS). Journal Of Affective Disorders 2018, 232: 34-40. PMID: 29477096, DOI: 10.1016/j.jad.2018.02.045.Peer-Reviewed Original ResearchMeSH KeywordsAdultAgedCohort StudiesCross-Sectional StudiesDepressionFemaleHumansMaleMiddle AgedNeuropsychological TestsPregnancyReference StandardsRegistriesReproducibility of ResultsRisk AssessmentSensitivity and SpecificitySocioeconomic FactorsSuicidal IdeationSuicideSurveys and QuestionnairesYoung AdultConceptsPatient Health QuestionnaireColumbia-Suicide Severity Rating ScaleSeverity Rating ScaleSuicide riskItem 9Health QuestionnaireRating ScaleGold standardOverall poor resultsSuicide ideationClinical characteristicsOverall cohortCare registriesPHQ-9Depressed patientsClinical subgroupsSuicide itemPatientsPassive thoughtsSurrogate measureRiskPoor resultsFurther investigationIdeationAssessment tool
2016
Predictors of suicidal ideation in Korean American older adults: analysis of the Memory and Aging Study of Koreans (MASK)
Na PJ, Kim KB, Lee‐Tauler S, Han H, Kim MT, Lee HB. Predictors of suicidal ideation in Korean American older adults: analysis of the Memory and Aging Study of Koreans (MASK). International Journal Of Geriatric Psychiatry 2016, 32: 1272-1279. PMID: 27779333, PMCID: PMC5993045, DOI: 10.1002/gps.4608.Peer-Reviewed Original ResearchConceptsKorean American older adultsSelf-rated mental healthMinor depressive syndromeDepressive syndromeAmerican older adultsSuicidal ideationOlder adultsMental healthHealth statusPoor self-rated mental healthMajor depressive syndromePatient Health QuestionnairePhysical health statusMental health statusSuicide prevention interventionsCommunity-representative sampleHealth QuestionnaireEpidemiologic studiesPrevention interventionsSelf-rated mental health statusBaltimore-Washington areaSyndromeSuicide riskEarly detectionAging Study