Is there an optimal factor structure of the Positive and Negative Syndrome Scale in patients with first-episode psychosis?

Johannes Langeveld, OA Andreassen, B Auestad, A Faerden, LJ Hauge, Inge Joa, Jan Olav Johannessen, Ingrid Melle, Bjørn Rishovd Rund, Jan Ivar Røssberg, Erik Simonsen, Per Vaglum, Tor Ketil Larsen

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

    Resumé

    The Positive and Negative Syndrome Scale (PANSS) is the most widely used scale to assess a variety of symptoms in patients with schizophrenia and other psychoses. The factor structure of the PANSS has been examined with confirmatory factor analyses in several studies, but not in a well-defined first-episode psychosis sample. The aim of this paper is to examine the statistical fit of five different PANSS models in a first-episode, non-affective psychosis sample. Confirmatory factor analyses were performed on PANSS data (n = 588). A main criterion for best fit was defined as the Expected Cross Validation Index (ECVI). No tested model revealed an optimally satisfactory model fit index. The Wallwork/Fortgang five-factor model demonstrated the most optimal psychometric properties. The corresponding subscales of all evaluated five-factor models were strongly intercorrelated. The Wallwork/Fortgang five-factor model was found to be statistically and clinically ideal among patients with first-episode psychosis. Therefore, we recommend this model in forthcoming studies among patients with first-episode psychosis. However, to prevent the loss of clinically valuable information on an item level, we do not recommend removing any items from the original form. Our study also implies that the specific choice of model will not have a substantial effect on outcome results in studies on the course and outcome in first-episode psychosis.
    OriginalsprogEngelsk
    TidsskriftScandinavian Journal of Psychology
    Vol/bind54
    Udgave nummer2
    Sider (fra-til)160-165
    ISSN0036-5564
    DOI
    StatusUdgivet - 2013

    Citer dette

    Langeveld, Johannes ; Andreassen, OA ; Auestad, B ; Faerden, A ; Hauge, LJ ; Joa, Inge ; Johannessen, Jan Olav ; Melle, Ingrid ; Rund, Bjørn Rishovd ; Røssberg, Jan Ivar ; Simonsen, Erik ; Vaglum, Per ; Larsen, Tor Ketil. / Is there an optimal factor structure of the Positive and Negative Syndrome Scale in patients with first-episode psychosis?. I: Scandinavian Journal of Psychology. 2013 ; Bind 54, Nr. 2. s. 160-165.
    @article{a8daaeb29515430bbc7b00b14f76f7ea,
    title = "Is there an optimal factor structure of the Positive and Negative Syndrome Scale in patients with first-episode psychosis?",
    abstract = "The Positive and Negative Syndrome Scale (PANSS) is the most widely used scale to assess a variety of symptoms in patients with schizophrenia and other psychoses. The factor structure of the PANSS has been examined with confirmatory factor analyses in several studies, but not in a well-defined first-episode psychosis sample. The aim of this paper is to examine the statistical fit of five different PANSS models in a first-episode, non-affective psychosis sample. Confirmatory factor analyses were performed on PANSS data (n = 588). A main criterion for best fit was defined as the Expected Cross Validation Index (ECVI). No tested model revealed an optimally satisfactory model fit index. The Wallwork/Fortgang five-factor model demonstrated the most optimal psychometric properties. The corresponding subscales of all evaluated five-factor models were strongly intercorrelated. The Wallwork/Fortgang five-factor model was found to be statistically and clinically ideal among patients with first-episode psychosis. Therefore, we recommend this model in forthcoming studies among patients with first-episode psychosis. However, to prevent the loss of clinically valuable information on an item level, we do not recommend removing any items from the original form. Our study also implies that the specific choice of model will not have a substantial effect on outcome results in studies on the course and outcome in first-episode psychosis.",
    author = "Johannes Langeveld and OA Andreassen and B Auestad and A Faerden and LJ Hauge and Inge Joa and Johannessen, {Jan Olav} and Ingrid Melle and Rund, {Bj{\o}rn Rishovd} and R{\o}ssberg, {Jan Ivar} and Erik Simonsen and Per Vaglum and Larsen, {Tor Ketil}",
    year = "2013",
    doi = "10.1111/sjop.12017",
    language = "English",
    volume = "54",
    pages = "160--165",
    journal = "Scandinavian Journal of Psychology",
    issn = "0036-5564",
    publisher = "The Scandinavian Psychological Associations",
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    Langeveld, J, Andreassen, OA, Auestad, B, Faerden, A, Hauge, LJ, Joa, I, Johannessen, JO, Melle, I, Rund, BR, Røssberg, JI, Simonsen, E, Vaglum, P & Larsen, TK 2013, 'Is there an optimal factor structure of the Positive and Negative Syndrome Scale in patients with first-episode psychosis?' Scandinavian Journal of Psychology, bind 54, nr. 2, s. 160-165. https://doi.org/10.1111/sjop.12017

    Is there an optimal factor structure of the Positive and Negative Syndrome Scale in patients with first-episode psychosis? / Langeveld, Johannes; Andreassen, OA; Auestad, B; Faerden, A; Hauge, LJ; Joa, Inge; Johannessen, Jan Olav; Melle, Ingrid; Rund, Bjørn Rishovd; Røssberg, Jan Ivar; Simonsen, Erik; Vaglum, Per; Larsen, Tor Ketil.

    I: Scandinavian Journal of Psychology, Bind 54, Nr. 2, 2013, s. 160-165.

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

    TY - JOUR

    T1 - Is there an optimal factor structure of the Positive and Negative Syndrome Scale in patients with first-episode psychosis?

    AU - Langeveld, Johannes

    AU - Andreassen, OA

    AU - Auestad, B

    AU - Faerden, A

    AU - Hauge, LJ

    AU - Joa, Inge

    AU - Johannessen, Jan Olav

    AU - Melle, Ingrid

    AU - Rund, Bjørn Rishovd

    AU - Røssberg, Jan Ivar

    AU - Simonsen, Erik

    AU - Vaglum, Per

    AU - Larsen, Tor Ketil

    PY - 2013

    Y1 - 2013

    N2 - The Positive and Negative Syndrome Scale (PANSS) is the most widely used scale to assess a variety of symptoms in patients with schizophrenia and other psychoses. The factor structure of the PANSS has been examined with confirmatory factor analyses in several studies, but not in a well-defined first-episode psychosis sample. The aim of this paper is to examine the statistical fit of five different PANSS models in a first-episode, non-affective psychosis sample. Confirmatory factor analyses were performed on PANSS data (n = 588). A main criterion for best fit was defined as the Expected Cross Validation Index (ECVI). No tested model revealed an optimally satisfactory model fit index. The Wallwork/Fortgang five-factor model demonstrated the most optimal psychometric properties. The corresponding subscales of all evaluated five-factor models were strongly intercorrelated. The Wallwork/Fortgang five-factor model was found to be statistically and clinically ideal among patients with first-episode psychosis. Therefore, we recommend this model in forthcoming studies among patients with first-episode psychosis. However, to prevent the loss of clinically valuable information on an item level, we do not recommend removing any items from the original form. Our study also implies that the specific choice of model will not have a substantial effect on outcome results in studies on the course and outcome in first-episode psychosis.

    AB - The Positive and Negative Syndrome Scale (PANSS) is the most widely used scale to assess a variety of symptoms in patients with schizophrenia and other psychoses. The factor structure of the PANSS has been examined with confirmatory factor analyses in several studies, but not in a well-defined first-episode psychosis sample. The aim of this paper is to examine the statistical fit of five different PANSS models in a first-episode, non-affective psychosis sample. Confirmatory factor analyses were performed on PANSS data (n = 588). A main criterion for best fit was defined as the Expected Cross Validation Index (ECVI). No tested model revealed an optimally satisfactory model fit index. The Wallwork/Fortgang five-factor model demonstrated the most optimal psychometric properties. The corresponding subscales of all evaluated five-factor models were strongly intercorrelated. The Wallwork/Fortgang five-factor model was found to be statistically and clinically ideal among patients with first-episode psychosis. Therefore, we recommend this model in forthcoming studies among patients with first-episode psychosis. However, to prevent the loss of clinically valuable information on an item level, we do not recommend removing any items from the original form. Our study also implies that the specific choice of model will not have a substantial effect on outcome results in studies on the course and outcome in first-episode psychosis.

    U2 - 10.1111/sjop.12017

    DO - 10.1111/sjop.12017

    M3 - Journal article

    VL - 54

    SP - 160

    EP - 165

    JO - Scandinavian Journal of Psychology

    JF - Scandinavian Journal of Psychology

    SN - 0036-5564

    IS - 2

    ER -