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Drug Attitude, Insight, and Patient’s Knowledge About Prescribed Antipsychotics in Schizophrenia: A Cross-Sectional Survey

Authors Nagai N, Tani H, Yoshida K, Gerretsen P, Suzuki T, Ikai-Tani S, Mimura M, Uchida H

Received 28 November 2019

Accepted for publication 26 February 2020

Published 23 March 2020 Volume 2020:16 Pages 781—787

DOI https://doi.org/10.2147/NDT.S240377

Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 2

Editor who approved publication: Dr Taro Kishi


Nobuhiro Nagai, 1–3 Hideaki Tani, 1, 4 Kazunari Yoshida, 1, 5 Philip Gerretsen, 6, 7 Takefumi Suzuki, 8 Saeko Ikai-Tani, 1, 9 Masaru Mimura, 1 Hiroyuki Uchida 1

1Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, Japan; 2Department of Psychiatry, Minami-Hanno Hospital, Saitama, Japan; 3Department of Psychiatry, Tokyo-Kaido Hospital, Tokyo, Japan; 4Kimel Family Translational Imaging-Genetics Laboratory, Centre for Addiction and Mental Health, Toronto, ON, Canada; 5Pharmacogenetics Research Clinic, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, ON, Canada; 6Multimodal Imaging Group - Research Imaging Centre, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, ON, Canada; 7Geriatric Psychiatry Division, Centre for Addiction and Mental Health, Toronto, ON, Canada; 8Department of Neuropsychiatry, University of Yamanashi Faculty of Medicine, Yamanashi, Japan; 9Physical Activity and Mental Health, Faculty of Kinesiology & Physical Education, University of Toronto, Toronto, ON, Canada

Correspondence: Hiroyuki Uchida
Department of Neuropsychiatry, Keio University School of Medicine, 35, Shinanomachi, Shinjuku-Ku, Tokyo 160-8582, Japan
Tel +81353633829
Fax +81353790187
Email hiroyuki.uchida.hu@gmail.com

Introduction: While patients’ perspectives toward pharmacotherapy are expected to be directly influenced by their motivation and understanding of the treatment that they are currently receiving, no study has comprehensively investigated the impact of insight into illness and knowledge for the ongoing pharmacotherapy on the attitude towards drug treatment among patients with schizophrenia.
Materials and Methods: One hundred forty-eight Japanese outpatients diagnosed with schizophrenia, according to the International Classification of Diseases 10th edition, were included (mean±SD age, 47.3± 12.4 years; 90 men (60.8%)). Attitudes toward antipsychotic treatment and insight into illness were assessed with the Drug Attitude Inventory-10 (DAI-10) and the VAGUS, respectively. In addition, a multiple-choice questionnaire that was designed to examine patients’ knowledge about therapeutic effects, types, and implicated neurotransmitters of antipsychotic drugs they were receiving was utilized.
Results: The mean±SD of DAI-10 score was 4.7± 4.2. The multiple regression analysis found that lower Positive and Negative Syndrome Scale (PANSS) scores, higher VAGUS scores, and longer illness duration were significantly associated with higher DAI-10 scores (β=− 0.226, P=0.009; β=0.250, P=0.008; β=0.203, P=0.034, respectively). There was a significant difference in the DAI-10 scores between the subjects who gave more accurate answers regarding the effects of their primary antipsychotic and those who did not (mean±SD, 5.57± 4.38 vs 4.13± 4.04, P=0.043); however, this finding failed to survive the multiple regression analysis.
Conclusion: Better insight into illness and treatment, lower illness severity, longer illness duration, and possibly greater knowledge about the therapeutic effects of medications may lead to better attitudes towards pharmacotherapy among patients with schizophrenia, which has an important implication for this typically chronic mental condition requiring long-term antipsychotic treatment to sustain stability.

Keywords: drug attitude, adherence, insight, knowledge, schizophrenia, antipsychotic
 

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