Addington J, Addington D (2001). Impact of an early psychosis program on substance use. Psychiatric Rehabilitation Journal 25, 60–66.
Addington J, Duchak V (1997). Reasons for substance use in schizophrenia. Acta Psychiatrica Scandinavica 96, 329–333.
Ambrose ML, Bowden SC, Whelan G (2001). Working memory impairments in alcohol-dependent participants without clinical amnesia. Alcoholism: Clinical and Experimental Research 25, 185–191.
Andreasen N (1990). Methods for assessing positive and negative symptoms. In Schizophrenia: Positive and Negative Symptoms and Syndromes. Modern Problems in Pharmacopsychiatry (ed. Andreasen N.), pp. 73–85. Karger: Basel.
Asberg M, Montgomery SA, Perris C, Schalling D, Sedvall G (1978). A comprehensive psychopathological rating scale. Acta Psychiatrica Scandinavica 271 (Suppl.), 5–27.
Barnes TRE (1989). A scale for rating drug-induced akathisia. British Journal of Psychiatry 154, 486–491.
Barnes TRE, Mutsatsa SH, Hutton SB, Watt HC, Joyce EM (2006). Comorbid substance use and age at onset of schizophrenia. British Journal of Psychiatry 188, 237–242.
Battachary S, Powell JH (2001). Recreational use of 3,4-methylenedioxymethamphetamine (MDMA) or ‘ecstasy’: evidence for cognitive impairment. Psychological Medicine 31, 647–658.
Birchwood M, Smith J, Cochrane R, Wetton S, Copestake S (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.
Block RI, Erwin WJ, Ghoneim MM (2002). Chronic drug use and cognitive impairments. Pharmacology, Biochemistry and Behavior 73, 491–504.
Bühler B, Hambrecht M, Löffler W, an der Heiden W, Häfner H (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.
Caspari D (1999). Cannabis and schizophrenia: results of a follow-up study. European Archives of Psychiatry and Clinical Neuroscience 249, 45–49.
Condren RM, O'Connor J, Browne R (2001). Prevalence and patterns of substance misuse in schizophrenia: a catchment area case-control study. Psychiatric Bulletin 25, 17–20.
Croft RJ, Mackay AJ, Mills AT, Gruzelier JG (2001). The relative contributions of ecstasy and cannabis to cognitive impairment. Psychopharmacology 153, 373–379.
David AS (1990). Insight and psychosis. British Journal of Psychiatry 156, 798–808.
Drake RE, Brunette MF (1998). Complications of severe mental illness related to alcohol and other drug disorders. In Recent Developments in Alcoholism (ed. Galanter M.), pp. 285–299. Plenum: New York.
Drake RE, Xie H, McHugo GJ, Green AI (2000). The effects of clozapine on alcohol and drug use disorders among patients with schizophrenia. Schizophrenia Bulletin 26, 441–449.
Duke PJ, Pantelis C, Barnes TRE (1994). South Westminster Schizophrenia Survey. Alcohol use and its relationship to symptoms, tardive dyskinesia and illness onset. British Journal of Psychiatry 164, 630–636.
Duke PJ, Pantelis C, McPhillips MA, Barnes TRE (2001). Comorbid substance misuse among people with schizophrenia in the community: an epidemiological study in central London. British Journal of Psychiatry 179, 501–513.
Fletcher JM, Page JB, Francis DJ, Copeland K, Naus MJ, Davis CM, Morris R, Krauskopf D, Satz P (1996). Cognitive correlates of long-term cannabis use in Costa Rican men. Archives of General Psychiatry 53, 1051–1057.
Gouzoulis-Mayfrank E, Daumann J, Tuchtenhagen F, Pelz S, Becker S, Kunert HJ, Fimm B, Sass H (2000). Impaired cognitive performance in drug free users of recreational ecstasy (MDMA). Journal of Neurology, Neurosurgery and Psychiatry 68, 719–725.
Grech A, Van Os J, Jones PB, Lewis SW, Murray RM (2005). Cannabis use and outcome of recent onset psychosis. European Psychiatry 20, 349–353.
Green AI, Tohen MF, Hamer RM, Strakowski SM, Lieberman JA, Glick I, Clark WS; HGDH Research Group (2004). First-episode schizophrenia-related psychosis and substance use disorders: acute response to olanzapine and haloperidol. Schizophrenia Research 66, 125–136.
Guy W (1976). ECDEU Assessment Manual for Psychopharmacology, pp. 76–338. National Institute for Mental Health: Rockville, MD.
Hunt GE, Bergen J, Bashir M (2002). Medication compliance and comorbid substance abuse in schizophrenia: impact on community survival 4 years after a relapse. Schizophrenia Research 54, 253–264.
Hutton SB, Puri BK, Duncan LJ, Robbins TW, Barnes TRE, Joyce EM (1998). Executive function in first-episode schizophrenia. Psychological Medicine 28, 463–473.
Joyal CC, Hallé P, Lapierre D, Hodgins S (2003). Drug abuse and/or dependence and better neuropsychological performance in patients with schizophrenia. Schizophrenia Research 63, 297–299.
Joyce E, Hutton S, Mutsatsa S, Gibbins H, Webb E, Paul S, Robbins T, Barnes TRE (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.
Kapasi M, Hutton SB, Mutsatsa S, Barnes TRE, Joyce EM (2004). Treatment effects of conventional and atypical antipsychotics on cognition following a first episode of schizophrenia. Journal of Psychopharmacology 18, A63.
Kavanagh DJ, Waghorn G, Jenner L, Chant DC, Carr V, Evans M, Hemnan H, Jablensky A, McGrath JJ (2004). Demographic and clinical correlates of comorbid substance use disorders in psychosis: multivariate analyses from an epidemiological sample. Schizophrenia Research 66, 115–124.
Lambert M, Conus P, Lubman DI, Wade D, Yuen H, Moritz S, Naber D, McGorry PD, Schimmelmann BG (2005). The impact of substance use disorders on clinical outcome in 643 patients with first-episode psychosis. Acta Psychiatrica Scandinavica 112, 141–148.
Liddle PF, Barnes TRE (1990). Syndromes of chronic schizophrenia. British Journal of Psychiatry 157, 558–561.
Linszen DH, Dingemans PM, Lenoir ME (1994). Cannabis abuse and the course of recent-onset schizophrenic disorders. Archives of General Psychiatry 51, 273–279.
Lundqvist T (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.
Magura S, Kang SY (1996). Validity of self-reported drug use in high risk populations: a meta-analytical review. Substance Abuse and Misuse 31, 1131–1153.
Martin GW, Wilkinson DA, Kaur BM (1988). Validation of self-reported cannabis use by urine analysis. Addictive Behaviors 13, 147–150.
McCleery A, Addington J, Addington D (2006). Substance misuse and cognitive functioning in early psychosis: a 2 year follow-up. Schizophrenia Research 88, 187–191.
Montgomery SA, Asberg M (1979). A new depression scale designed to be sensitive to change. British Journal of Psychiatry 134, 382–389.
Morgan MJ, McFie L, Fleetwood H, Robinson JA (2002). Ecstasy (MDMA): are the psychological problems associated with its use reversed by prolonged abstinence? Psychopharmacology 159, 294–303.
Mutsatsa S, Joyce EM, Hutton S, Webb E, Gibbins H, Paul S, Barnes TRE (2003). Clinical correlates of early medication compliance: West London first episode schizophrenia study. Acta Psychiatrica Scandinavica 108, 439–446.
Nelson H, Willison J (1991). The Revised National Adult Reading Test (NART) – Test Manual, 2nd edn. NFER-Nelson: Windsor.
Ornstein TJ, Iddon JL, Baldacchino AM, Sahakian BJ, London M, Everitt BJ, Robbins TW (2000). Profiles of cognitive dysfunction in chronic amphetamine and heroin abusers. Neuropsychopharmacology 23, 113–126.
Pencer A, Addington J (2003). Substance use and cognition in early psychosis. Journal of Psychiatry and Neuroscience 28, 48–54.
Potvin S, Briand C, Proteau A, Bouchard RH, Lipp O, Lalonde P, Nicole L, Lesage A, Stip E (2005). CANTAB explicit memory is less impaired in addicted schizophrenia patients. Brain and Cognition 59, 38–42.
Potvin S, Stip E, Roy JY (2003). Clozapine, quetiapine and olanzapine among addicted schizophrenic patients: towards testable hypotheses. International Clinical Psychopharmacology 18, 121–132.
Rodgers J (2000). Cognitive performance amongst recreational users of ‘ecstasy’. Psychopharmacology 151, 19–24.
Sahakian B, Owen A (1992). Computerised assessment in neuropsychiatry using CANTAB. Journal of the Royal Society of Medicine 85, 399–402.
Salyers MP, Mueser KT (2001). Social functioning, psychopathology and medication side effects in relation to substance use and abuse in schizophrenia. Schizophrenia Research 48, 109–123.
Santin LJ, Rubio S, Begega A, Arias JL (2000). Effects of chronic alcohol consumption on spatial reference and working memory tasks. Alcohol 20, 149–159.
Schooler NR, Kane JM (1982). Research diagnoses for tardive dyskinesia. Archives of General Psychiatry 39, 486–487.
Sevy S, Robinson DG, Holloway S, Alvir JM, Woerner MG, Bilder R, Goldman R, Lieberman J, Kane J (2001). Correlates of substance misuse in patients with first-episode schizophrenia and schizoaffective disorder. Acta Psychiatrica Scandinavica 104, 367–374.
Simpson GM, Angus JWS (1970). A rating scale for extrapyramidal side-effects in drug-induced extrapyramidal disorders. Acta Psychiatrica Scandinavica 212, 11–19.
Smelson DA, Losonczy MF, Davis CW, Kaune M, Williams J, Ziedonis D (2002). Risperidone decreases craving and relapses in individuals with schizophrenia and cocaine dependence. Canadian Journal of Psychiatry 47, 671–675.
Sorbara F, Liraud F, Assens F, Abalan F, Verdoux H (2003). Substance use and the course of early psychosis: a 2-year follow-up of first-admitted subjects. Schizophrenia Research 18, 133–136.
Spencer CR, Castle D, Michie PT (2002). Motivations that maintain substance use among individuals with psychotic disorders. Schizophrenia Bulletin 28, 233–247.
Wade D, Harrigan S, Edwards J, Burgess PM, Whelan G, McGorry PD (2006). Course of substance misuse and daily tobacco use in first-episode psychosis. Schizophrenia Research 81, 145–150.
Weaver T, Madden P, Charles V, Stimson G, Renton A, Tyrer P, Barnes TRE, Bench C, Middleton H, Wright N, Paterson S, Shanahan W, Seivewright N, Ford Con 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.
Weiss RD, Najavits LM, Greenfield SF, Soto JA, Shaw SR, Wynerm D (1998). Validity of substance use self-reports in dually diagnosed outpatients. American Journal of Psychiatry 155, 127–128.
Weissenborn R, Duka T (2003). Acute alcohol effects on cognitive function in social drinkers: their relationship to drinking habits. Psychopharmacology 165, 306–312.