• 1
    Siris SG, Bench C. Depression and schizophrenia. In: HirschSR, WeinbergerDR, eds. Schizophrenia, 2nd edn. Oxford: Blackwell Publishing, 2003; 14267.
  • 2
    Hafner H, Maurer K, Trendler G, an der Heiden W, Schmidt M, Konnecke R. Schizophrenia and depression: challenging the paradigm of two separate diseases-a controlled study of schizophrenia, depression and healthy controls. Schizophr Res 2005; 77: 1124.
  • 3
    Kitamura T, Okazaki Y, Fujinawa A, Yoshino M, Kasahara Y. (1995). Symptoms of psychoses: a factor-analytic study. Br J Psychiatry 1995; 166: 23640.
  • 4
    Lenzenweger MF, Dworkin RH. The dimensions of schizophrenia phenomenology: not one or two, at least three, perhaps four. Br J Psychiatry 1996; 68: 43240.
  • 5
    McGorry PD, Bell RC, Dudgeon PL, Jackson HJ. The dimensional structure of first episode psychosis: an exploratory factor analysis. Psychol Med 1998; 28: 93547.
  • 6
    Van Os J, Gilvarry C, Bale R et al. A comparison of the utility of dimensional and categorical representations of psychosis. Psychol Med 1999; 29: 595606.
  • 7
    Blanchard JJ, Cohen AS. The structure of negative symptoms within schizophrenia: implications for assessment. Schizophr Bull 2006; 32: 23845.
  • 8
    Hafner H, Loffler W, Maurer K, Hambrecht M, An Der Heiden W. Depression, negative symptoms, social stagnation and social decline in the early course of schizophrenia. Acta Psychiatr Scand 1999; 100: 10518.
  • 9
    Meyer SE, Bearden CE, Lux SR et al. The psychosis prodrome in adolescent patients viewed through the lens of DSM-IV. J Child Adol Psychopharmacol 2005; 15: 43451.
  • 10
    Yung AR, McGorry PD. The prodromal phase of first-episode psychosis: past and current conceptualizations. Schizophr Bull 1996; 22: 35370.
  • 11
    Hafner H, Maurer K, Loffler W et al. The ABC Schizophrenia Study: a preliminary overview of the results. Soc Psychiatry Psychiatr Epidemiol 1998; 33: 3806.
  • 12
    Hafner H. Onset and early course as determinants of the further course of schizophrenia. Acta Psychiatr Scand 2000; 407: 448.
  • 13
    Hafner H, Riecher-Rossler A, Hambrecht M et al. IRAOS: an instrument for the assessment of onset and early course of schizophrenia. Schizophr Res 1992; 6: 20923.
  • 14
    An der Heiden W, Hafner H. The epidemiology of onset and course of schizophrenia. Eur Arch Psychiatry Clin Neurosci 2000; 250: 292303.
  • 15
    Singh SP, Cooper JE, Fisher HL et al. Determining the chronology and components of psychosis onset: the Nottingham Onset Schedule (NOS). Schizophr Res 2005; 80: 11730.
  • 16
    Klosterkotter J, Hellmich M, Steinmeyer EM, Schultze-Lutter F. Diagnosing schizophrenia in the initial prodromal phase. Arch Gen Psychiatry 2001; 58: 15864.
  • 17
    Gross G, Huber G, Klosterkotter J, Linz M. BSABS: Bonn Scale for the Assessment of Basic Symptoms. Berlin, Heidelberg, NY: Springer, 1997.
  • 18
    Krabbendam L, Myin-Germeys I, Hanssen M et al. Development of depressed mood predicts onset of psychotic disorder in individuals who report hallucinatory experiences. Br J Clin Psychol 2005; 44: 11325.
  • 19
    Yung AR, Phillips LJ, Yuen HP, McGorry PD. Risk factors for psychosis in an ultra high-risk group: psychopathology and clinical features. Schizophr Res 2004; 67: 13142.
  • 20
    Cornblatt BA, Lencz T, Smith CW et al. The schizophrenia prodrome revisited: a neurodevelopmental perspective. Schizophr Bull 2003; 29: 63351.
  • 21
    Lencz T, Smith CW, Auther A, Correll CU, Cornblatt B. Nonspecific and attenuated negative symptoms in patients at clinical high-risk for schizophrenia. Schizophr Res 2004; 68: 3748.
  • 22
    Myles-Worsley M, Coon H, Tiobech J et al. Genetic epidemiological study of schizophrenia in Palau, Micronesia: prevalence and familiality. Am J Med Genet: Neuropsychiatr Genet 1999; 88: 410.
  • 23
    Myles-Worsley M, Blailes F, Ord LM, Weaver S, Dever G, Faraone S. The Palau Early Psychosis Study: distribution of cases by level of genetic risk. Am J Med Genet: Neuropsychiatr Genet 2007; 144: 59.
  • 24
    Ord LM, Myles-Worsley M, Blailes F, Ngiralmau H. Screening for prodromal adolescents in an isolated high-risk population. Schizophr Res 2004; 71: 5078.
  • 25
    Kaufman J, Birmaher B, Brent D et al. Schedule for affective disorders and schizophrenia for school-age children-present and lifetime version (K-SADS-PL): Initial reliability and validity data. J Am Acad Child Adolesc Psychiatry 1997; 36: 9808.
  • 26
    Yung AR, Yuen HP, McGorry PD et al. Mapping the onset of psychosis: the Comprehensive Assessment of At-Risk Mental States. Aust N Z J Psychiatry 2005; 39: 96471.
  • 27
    McGorry PD, Yung AR, Phillips LJ. The ‘close-in’ or ultra high-risk model: a safe and effective strategy for research and clinical intervention in prepsychotic mental disorder. Schizophr Bull 2003; 29: 77190.
  • 28
    American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders, 4th edn. Washington, DC: American Psychiatric Association, 1994.
  • 29
    Owens DG, Miller P, Lawrie SM, Johnstone EC. Pathogenesis of schizophrenia: a psychopathological perspective. Br J Psychiatry 2005; 186: 38693.
  • 30
    Miller TJ, McGlashan TH, Rosen J et al. Prodromal assessment with the structured interview for prodromal syndromes and the scale of prodromal symptoms: predictive validity, interrater reliability, and training to reliability. Schizophr Bull 2003; 29: 70315.
  • 31
    Olsen KA, Rosenbaum B. Prospective investigations of the prodromal state of schizophrenia: assessment instruments. Acta Psychiatr Scand 2006; 113: 27382.