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Reliability of the glasgow antipsychotic side-effects scale for Clozapine Japanese version (GASS-C-J)

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Reliability of the glasgow antipsychotic side-effects scale for Clozapine Japanese version (GASS-C-J). / Kitagawa, Kohei; So, Ryuhei; Nomura, Nobuyuki; Mizuno, Yuya; Misawa, Fuminari; Kodama, Masafumi; Uchida, Hiroyuki; Mimura, Masaru; Takeuchi, Hiroyoshi.

In: PLoS ONE, Vol. 15, No. 6, e0234864, 06.2020.

Research output: Contribution to journalArticle

Harvard

Kitagawa, K, So, R, Nomura, N, Mizuno, Y, Misawa, F, Kodama, M, Uchida, H, Mimura, M & Takeuchi, H 2020, 'Reliability of the glasgow antipsychotic side-effects scale for Clozapine Japanese version (GASS-C-J)', PLoS ONE, vol. 15, no. 6, e0234864. https://doi.org/10.1371/journal.pone.0234864

APA

Kitagawa, K., So, R., Nomura, N., Mizuno, Y., Misawa, F., Kodama, M., Uchida, H., Mimura, M., & Takeuchi, H. (2020). Reliability of the glasgow antipsychotic side-effects scale for Clozapine Japanese version (GASS-C-J). PLoS ONE, 15(6), [e0234864]. https://doi.org/10.1371/journal.pone.0234864

Vancouver

Kitagawa K, So R, Nomura N, Mizuno Y, Misawa F, Kodama M et al. Reliability of the glasgow antipsychotic side-effects scale for Clozapine Japanese version (GASS-C-J). PLoS ONE. 2020 Jun;15(6). e0234864. https://doi.org/10.1371/journal.pone.0234864

Author

Kitagawa, Kohei ; So, Ryuhei ; Nomura, Nobuyuki ; Mizuno, Yuya ; Misawa, Fuminari ; Kodama, Masafumi ; Uchida, Hiroyuki ; Mimura, Masaru ; Takeuchi, Hiroyoshi. / Reliability of the glasgow antipsychotic side-effects scale for Clozapine Japanese version (GASS-C-J). In: PLoS ONE. 2020 ; Vol. 15, No. 6.

Bibtex Download

@article{c1fa5240fbca4dcca331555ff7ee8dd3,
title = "Reliability of the glasgow antipsychotic side-effects scale for Clozapine Japanese version (GASS-C-J)",
abstract = "The purpose of this study was to develop the Glasgow Antipsychotic Side effects Scale for Clozapine Japanese version (GASS-C-J) and examine its reliability to assess clozapine-related side effects. We developed the GASS-C-J using forward and backward translation. Semantic equivalence of the GASS-C-J to the GASS-C was confirmed by the original author. We then administered the GASS-C-J twice to 109 patients on clozapine treatment at two psychiatric hospitals in Japan. We assessed the internal consistency and test-retest reliability of the GASS-C-J using Cronbach's alpha and weighted kappa coefficient, respectively. We also examined if discrepancies in each GASS-C-J item score between the first and second rating were correlated with items of the Brief Evaluation of Psychosis Symptom Domains (BE-PSD). The Cronbach's alpha coefficient of the GASS-C-J at the first and second rating was 0.78 (95% CI: 0.72 to 0.84) and 0.82 (95% CI: 0.76 to 0.88), respectively. The weighted kappa coefficient of individual and total GASS-C-J item scores ranged from 0.45 to 0.88. Some symptom domains were correlated with discrepancies in specific items of the GASS-C-J: psychotic symptoms and nausea/vomiting (rs = 0.27), thirst (rs = 0.31), and appetite/weight gain (rs = 0.27); disorganized thinking and urinary incontinence (rs = 0.26); depression/anxiety and myoclonus (rs = 0.25), hypersalivation (rs = -0.27), and blurred vision (rs = -0.22). These findings demonstrate that the GASS-C-J can be used in clinical and research settings as a reliable scale to assess clozapine-related side effects.",
author = "Kohei Kitagawa and Ryuhei So and Nobuyuki Nomura and Yuya Mizuno and Fuminari Misawa and Masafumi Kodama and Hiroyuki Uchida and Masaru Mimura and Hiroyoshi Takeuchi",
year = "2020",
month = jun,
doi = "10.1371/journal.pone.0234864",
language = "English",
volume = "15",
journal = "PL o S One ",
issn = "1932-6203",
publisher = "Public Library of Science",
number = "6",

}

RIS (suitable for import to EndNote) Download

TY - JOUR

T1 - Reliability of the glasgow antipsychotic side-effects scale for Clozapine Japanese version (GASS-C-J)

AU - Kitagawa, Kohei

AU - So, Ryuhei

AU - Nomura, Nobuyuki

AU - Mizuno, Yuya

AU - Misawa, Fuminari

AU - Kodama, Masafumi

AU - Uchida, Hiroyuki

AU - Mimura, Masaru

AU - Takeuchi, Hiroyoshi

PY - 2020/6

Y1 - 2020/6

N2 - The purpose of this study was to develop the Glasgow Antipsychotic Side effects Scale for Clozapine Japanese version (GASS-C-J) and examine its reliability to assess clozapine-related side effects. We developed the GASS-C-J using forward and backward translation. Semantic equivalence of the GASS-C-J to the GASS-C was confirmed by the original author. We then administered the GASS-C-J twice to 109 patients on clozapine treatment at two psychiatric hospitals in Japan. We assessed the internal consistency and test-retest reliability of the GASS-C-J using Cronbach's alpha and weighted kappa coefficient, respectively. We also examined if discrepancies in each GASS-C-J item score between the first and second rating were correlated with items of the Brief Evaluation of Psychosis Symptom Domains (BE-PSD). The Cronbach's alpha coefficient of the GASS-C-J at the first and second rating was 0.78 (95% CI: 0.72 to 0.84) and 0.82 (95% CI: 0.76 to 0.88), respectively. The weighted kappa coefficient of individual and total GASS-C-J item scores ranged from 0.45 to 0.88. Some symptom domains were correlated with discrepancies in specific items of the GASS-C-J: psychotic symptoms and nausea/vomiting (rs = 0.27), thirst (rs = 0.31), and appetite/weight gain (rs = 0.27); disorganized thinking and urinary incontinence (rs = 0.26); depression/anxiety and myoclonus (rs = 0.25), hypersalivation (rs = -0.27), and blurred vision (rs = -0.22). These findings demonstrate that the GASS-C-J can be used in clinical and research settings as a reliable scale to assess clozapine-related side effects.

AB - The purpose of this study was to develop the Glasgow Antipsychotic Side effects Scale for Clozapine Japanese version (GASS-C-J) and examine its reliability to assess clozapine-related side effects. We developed the GASS-C-J using forward and backward translation. Semantic equivalence of the GASS-C-J to the GASS-C was confirmed by the original author. We then administered the GASS-C-J twice to 109 patients on clozapine treatment at two psychiatric hospitals in Japan. We assessed the internal consistency and test-retest reliability of the GASS-C-J using Cronbach's alpha and weighted kappa coefficient, respectively. We also examined if discrepancies in each GASS-C-J item score between the first and second rating were correlated with items of the Brief Evaluation of Psychosis Symptom Domains (BE-PSD). The Cronbach's alpha coefficient of the GASS-C-J at the first and second rating was 0.78 (95% CI: 0.72 to 0.84) and 0.82 (95% CI: 0.76 to 0.88), respectively. The weighted kappa coefficient of individual and total GASS-C-J item scores ranged from 0.45 to 0.88. Some symptom domains were correlated with discrepancies in specific items of the GASS-C-J: psychotic symptoms and nausea/vomiting (rs = 0.27), thirst (rs = 0.31), and appetite/weight gain (rs = 0.27); disorganized thinking and urinary incontinence (rs = 0.26); depression/anxiety and myoclonus (rs = 0.25), hypersalivation (rs = -0.27), and blurred vision (rs = -0.22). These findings demonstrate that the GASS-C-J can be used in clinical and research settings as a reliable scale to assess clozapine-related side effects.

UR - http://www.scopus.com/inward/record.url?scp=85086707119&partnerID=8YFLogxK

U2 - 10.1371/journal.pone.0234864

DO - 10.1371/journal.pone.0234864

M3 - Article

C2 - 32555706

AN - SCOPUS:85086707119

VL - 15

JO - PL o S One

JF - PL o S One

SN - 1932-6203

IS - 6

M1 - e0234864

ER -

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