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Comparison between patient-reported and clinician-reported outcomes: Validation of the Japanese version of the Integrated Palliative care Outcome Scale for staff

Published online by Cambridge University Press:  05 March 2021

Hiroki Sakurai Open the ORCID record for Hiroki Sakurai [Opens in a new window] ,
Mitsunori Miyashita ,
Tatsuya Morita ,
Akemi Shirado Naito ,
Shingo Miyamoto ,
Hiroyuki Otani ,
Junko Nozato ,
Naosuke Yokomichi ,
Kengo Imai  and
Ai Oishi
...Show all authors
Hiroki Sakurai*
Affiliation:
Department of Palliative Medicine, Toranomon Hospital, Tokyo, Japan
Mitsunori Miyashita
Affiliation:
Department of Palliative Nursing and Health Sciences, Tohoku University Graduate School of Medicine, Sendai, Japan
Tatsuya Morita
Affiliation:
Department of Palliative and Supportive Care, Seirei Mikatahara General Hospital, Hamamatsu, Japan
Akemi Shirado Naito
Affiliation:
Department of Palliative Care, Miyazaki Medical Association Hospital, Miyazaki, Japan
Shingo Miyamoto
Affiliation:
Department of Medical Oncology, Japanese Red Cross Medical Center, Tokyo, Japan
Hiroyuki Otani
Affiliation:
Department of Palliative Care Team, and Palliative and Supportive Care, National Kyushu Cancer Center, Fukuoka, Japan
Junko Nozato
Affiliation:
Department of Cancer Center, Tokyo Medical and Dental University, Tokyo, Japan
Naosuke Yokomichi
Affiliation:
Department of Palliative and Supportive Care, Seirei Mikatahara General Hospital, Hamamatsu, Japan
Kengo Imai
Affiliation:
Seirei Hospice, Seirei Mikatahara General Hospital, Hamamatsu, Japan
Ai Oishi
Affiliation:
Primary Palliative Care Research Group, Usher Institute of Population Health Sciences and Informatics, the University of Edinburgh, Edinburgh, UK
Yoshiyuki Kizawa
Affiliation:
Department of Palliative Medicine, Kobe University School of Medicine, Kobe, Japan
Eisuke Matsushima
Affiliation:
Section of Liaison Psychiatry and Palliative Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
*
Author for correspondence: Hiroki Sakurai, Department of Palliative Medicine, Toranomon Hospital, 2-2-2 Toranomon, Minato-ku, Tokyo 105-8470, Japan. E-mail: [email protected]
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Abstract

Objectives

The goal of palliative and supportive care is to improve patients’ quality of life (QoL). Patient-reported outcome measures (PROMs) are the gold standard for the assessment of QoL and symptoms; however, when self-reporting is complicated, PROMs are often substituted with proxy-reported outcome measures, such as clinician-reported outcome measures. The objective of this study was to assess the validity and reliability of the Japanese version of the Integrated Palliative care Outcome Scale (IPOS) for staff (IPOS-Staff).

Methods

This multicenter, cross-sectional observational study was conducted concurrently with the validation of the IPOS for patients (IPOS-Patient). Japanese adult patients with cancer and their staff were recruited. We assessed the characteristics of the patients and staff members, missing values, prevalence, and total IPOS scores. For the analysis of criterion validity, intra-rater, and inter-rater reliability, we calculated intraclass correlations (ICCs).

Results

One hundred and forty-three patients completed the IPOS-Patient, and 79 medical staff members completed the IPOS-Staff. The most common missing values from IPOS-Staff were Family Anxiety (3.5%) and Sharing Feelings (3.5%). Over half of the patients scored themselves moderate or worse for Poor Mobility, Anxiety, and Family Anxiety, while staff members scored patients moderate or worse for Weakness, Anxiety, and Family Anxiety. For criterion validity (patient–staff agreement) as well as intra-rater and inter-rater reliability, ICCs ranged from 0.114 (Sharing Feelings) to 0.826 (Nausea), 0.720 (Anxiety) to 0.933 (Nausea), and −0.038 (Practical Problems) to 0.830 (Nausea), respectively.

Significance of results

The IPOS-Staff is easy to respond to; it has fair validity and reliability for physical items but poor for psycho-social items. By defining the context and objectives of its use and interpretation, the IPOS-Staff can be a useful tool for measuring outcomes in adult patients with cancer who cannot complete self-evaluations.

Keywords

CancerClinician-reported outcome measuresIntegrated Palliative care Outcome ScalePalliative care
Type
Original Article
Information
Palliative & Supportive Care , Volume 19 , Issue 6 , December 2021 , pp. 702 - 708
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Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press

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