J Addington , D Addington (2001). Impact of an early psychosis program on substance use. Psychiatric Rehabilitation Journal 25, 60–66.
J Addington , V Duchak (1997). Reasons for substance use in schizophrenia. Acta Psychiatrica Scandinavica 96, 329–333.
ML Ambrose , SC Bowden , G Whelan (2001). Working memory impairments in alcohol-dependent participants without clinical amnesia. Alcoholism: Clinical and Experimental Research 25, 185–191.
TRE Barnes (1989). A scale for rating drug-induced akathisia. British Journal of Psychiatry 154, 486–491.
TRE Barnes , SH Mutsatsa , SB Hutton , HC Watt , EM Joyce (2006). Comorbid substance use and age at onset of schizophrenia. British Journal of Psychiatry 188, 237–242.
M Birchwood , J Smith , R Cochrane , S Wetton , S Copestake (1990). Social Functioning Scale: the development and validation of a new scale of social adjustment for use in family intervention programmes with schizophrenic patients. British Journal of Psychiatry 157, 853–859.
RI Block , WJ Erwin , MM Ghoneim (2002). Chronic drug use and cognitive impairments. Pharmacology, Biochemistry and Behavior 73, 491–504.
B Bühler , M Hambrecht , W Löffler , W an der Heiden , H Häfner (2002). Precipitation and determination of the onset and course of schizophrenia by substance use – a retrospective and prospective study of 232 population-based first illness episodes. Schizophrenia Research 54, 243–251.
D Caspari (1999). Cannabis and schizophrenia: results of a follow-up study. European Archives of Psychiatry and Clinical Neuroscience 249, 45–49.
RM Condren , J O'Connor , R Browne (2001). Prevalence and patterns of substance misuse in schizophrenia: a catchment area case-control study. Psychiatric Bulletin 25, 17–20.
RJ Croft , AJ Mackay , AT Mills , JG Gruzelier (2001). The relative contributions of ecstasy and cannabis to cognitive impairment. Psychopharmacology 153, 373–379.
AS David (1990). Insight and psychosis. British Journal of Psychiatry 156, 798–808.
RE Drake , H Xie , GJ McHugo , AI Green (2000). The effects of clozapine on alcohol and drug use disorders among patients with schizophrenia. Schizophrenia Bulletin 26, 441–449.
PJ Duke , C Pantelis , TRE Barnes (1994). South Westminster Schizophrenia Survey. Alcohol use and its relationship to symptoms, tardive dyskinesia and illness onset. British Journal of Psychiatry 164, 630–636.
PJ Duke , C Pantelis , MA McPhillips , TRE Barnes (2001). Comorbid substance misuse among people with schizophrenia in the community: an epidemiological study in central London. British Journal of Psychiatry 179, 501–513.
JM Fletcher , JB Page , DJ Francis , K Copeland , MJ Naus , CM Davis , R Morris , D Krauskopf , P Satz (1996). Cognitive correlates of long-term cannabis use in Costa Rican men. Archives of General Psychiatry 53, 1051–1057.
E Gouzoulis-Mayfrank , J Daumann , F Tuchtenhagen , S Pelz , S Becker , HJ Kunert , B Fimm , H Sass (2000). Impaired cognitive performance in drug free users of recreational ecstasy (MDMA). Journal of Neurology, Neurosurgery and Psychiatry 68, 719–725.
A Grech , J Van Os , PB Jones , SW Lewis , RM Murray (2005). Cannabis use and outcome of recent onset psychosis. European Psychiatry 20, 349–353.
AI Green , MF Tohen , RM Hamer , SM Strakowski , JA Lieberman , I Glick , WS Clark ; HGDH Research Group (2004). First-episode schizophrenia-related psychosis and substance use disorders: acute response to olanzapine and haloperidol. Schizophrenia Research 66, 125–136.
GE Hunt , J Bergen , M Bashir (2002). Medication compliance and comorbid substance abuse in schizophrenia: impact on community survival 4 years after a relapse. Schizophrenia Research 54, 253–264.
SB Hutton , BK Puri , LJ Duncan , TW Robbins , TRE Barnes , EM Joyce (1998). Executive function in first-episode schizophrenia. Psychological Medicine 28, 463–473.
CC Joyal , P Hallé , D Lapierre , S Hodgins (2003). Drug abuse and/or dependence and better neuropsychological performance in patients with schizophrenia. Schizophrenia Research 63, 297–299.
E Joyce , S Hutton , S Mutsatsa , H Gibbins , E Webb , S Paul , T Robbins , TRE Barnes (2002). Executive dysfunction in first-episode schizophrenia and relationship to duration of untreated psychosis: the West London Study. British Journal of Psychiatry 181 (Suppl. 43), 38–44.
DJ Kavanagh , G Waghorn , L Jenner , DC Chant , V Carr , M Evans , H Hemnan , A Jablensky , JJ McGrath (2004). Demographic and clinical correlates of comorbid substance use disorders in psychosis: multivariate analyses from an epidemiological sample. Schizophrenia Research 66, 115–124.
M Lambert , P Conus , DI Lubman , D Wade , H Yuen , S Moritz , D Naber , PD McGorry , BG Schimmelmann (2005). The impact of substance use disorders on clinical outcome in 643 patients with first-episode psychosis. Acta Psychiatrica Scandinavica 112, 141–148.
PF Liddle , TRE Barnes (1990). Syndromes of chronic schizophrenia. British Journal of Psychiatry 157, 558–561.
DH Linszen , PM Dingemans , ME Lenoir (1994). Cannabis abuse and the course of recent-onset schizophrenic disorders. Archives of General Psychiatry 51, 273–279.
T Lundqvist (2005). Cognitive consequences of cannabis use: comparison with abuse of stimulants and heroin with regard to attention, memory and executive functions. Pharmacology, Biochemistry and Behavior 81, 319–330.
S Magura , SY Kang (1996). Validity of self-reported drug use in high risk populations: a meta-analytical review. Substance Abuse and Misuse 31, 1131–1153.
GW Martin , DA Wilkinson , BM Kaur (1988). Validation of self-reported cannabis use by urine analysis. Addictive Behaviors 13, 147–150.
A McCleery , J Addington , D Addington (2006). Substance misuse and cognitive functioning in early psychosis: a 2 year follow-up. Schizophrenia Research 88, 187–191.
SA Montgomery , M Asberg (1979). A new depression scale designed to be sensitive to change. British Journal of Psychiatry 134, 382–389.
MJ Morgan , L McFie , H Fleetwood , JA Robinson (2002). Ecstasy (MDMA): are the psychological problems associated with its use reversed by prolonged abstinence? Psychopharmacology 159, 294–303.
S Mutsatsa , EM Joyce , S Hutton , E Webb , H Gibbins , S Paul , TRE Barnes (2003). Clinical correlates of early medication compliance: West London first episode schizophrenia study. Acta Psychiatrica Scandinavica 108, 439–446.
TJ Ornstein , JL Iddon , AM Baldacchino , BJ Sahakian , M London , BJ Everitt , TW Robbins (2000). Profiles of cognitive dysfunction in chronic amphetamine and heroin abusers. Neuropsychopharmacology 23, 113–126.
S Potvin , C Briand , A Proteau , RH Bouchard , O Lipp , P Lalonde , L Nicole , A Lesage , E Stip (2005). CANTAB explicit memory is less impaired in addicted schizophrenia patients. Brain and Cognition 59, 38–42.
S Potvin , E Stip , JY Roy (2003). Clozapine, quetiapine and olanzapine among addicted schizophrenic patients: towards testable hypotheses. International Clinical Psychopharmacology 18, 121–132.
J Rodgers (2000). Cognitive performance amongst recreational users of ‘ecstasy’. Psychopharmacology 151, 19–24.
MP Salyers , KT Mueser (2001). Social functioning, psychopathology and medication side effects in relation to substance use and abuse in schizophrenia. Schizophrenia Research 48, 109–123.
LJ Santin , S Rubio , A Begega , JL Arias (2000). Effects of chronic alcohol consumption on spatial reference and working memory tasks. Alcohol 20, 149–159.
S Sevy , DG Robinson , S Holloway , JM Alvir , MG Woerner , R Bilder , R Goldman , J Lieberman , J Kane (2001). Correlates of substance misuse in patients with first-episode schizophrenia and schizoaffective disorder. Acta Psychiatrica Scandinavica 104, 367–374.
CR Spencer , D Castle , PT Michie (2002). Motivations that maintain substance use among individuals with psychotic disorders. Schizophrenia Bulletin 28, 233–247.
D Wade , S Harrigan , J Edwards , PM Burgess , G Whelan , PD McGorry (2006). Course of substance misuse and daily tobacco use in first-episode psychosis. Schizophrenia Research 81, 145–150.
T Weaver , P Madden , V Charles , G Stimson , A Renton , P Tyrer , TRE Barnes , C Bench , H Middleton , N Wright , S Paterson , W Shanahan , N Seivewright , C Ford on behalf of the Comorbidity of Substance Misuse and Mental Illness Collaborative (COSMIC) study team (2003). Comorbidity of substance misuse and mental illness in community mental health and substance misuse services. British Journal of Psychiatry 183, 304–313.
RD Weiss , LM Najavits , SF Greenfield , JA Soto , SR Shaw , D Wynerm (1998). Validity of substance use self-reports in dually diagnosed outpatients. American Journal of Psychiatry 155, 127–128.