1997
Cognitive impairment and substance abuse history as predictors of the temporal stability of negative symptoms in schizophrenia.
Lysaker P, Bell M, Bioty S, Zito W. Cognitive impairment and substance abuse history as predictors of the temporal stability of negative symptoms in schizophrenia. The Journal Of Nervous And Mental Disease 1997, 185: 21-6. PMID: 9040529, DOI: 10.1097/00005053-199701000-00004.Peer-Reviewed Original Research
1994
Relationship of Positive and Negative Symptoms to Cocaine Abuse in Schizophrenia
LYSAKER P, BELL M, BEAM-GOULET J, MILSTEIN R. Relationship of Positive and Negative Symptoms to Cocaine Abuse in Schizophrenia. The Journal Of Nervous And Mental Disease 1994, 182: 109-112. PMID: 8308528, DOI: 10.1097/00005053-199402000-00008.Peer-Reviewed Original ResearchConceptsCocaine-abusing subjectsNegative Syndrome ScaleCocaine abuseNegative symptomsParanoid subtypeSyndrome ScaleSubstance abuseMore frequent hospitalizationsFirst psychiatric hospitalizationLifetime substance abuseSevere negative symptomsSubstance abuse historyFrequent hospitalizationsPsychiatric hospitalizationAlcohol abusePositive symptomsMultivariate analysisSymptomsPatientsHospitalizationSignificant differencesSubtypesDiagnosisSchizophreniaMonths