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Validating the socio-spiritual items of the Utrecht Symptom Diary-4 Dimensional: Content and construct validity
Tom Lormans1, Everlien de Graaf1, Frederieke van der Baan2
1Center of Expertise Palliative Care Utrecht, UMC Utrecht, Utrecht, The Netherlands.
Background:
The Utrecht Symptom Diary-4 Dimensional (USD-4D) is a multidimensional Patient-Reported Outcome Measure to monitor symptoms and needs and increase patients' self-efficacy. Assessing the content and construct validity of the USD-4D ensures it accurately measures the intended construct and is contextually relevant.
Aims:
This study aimed to assess the content and construct validity of the socio-spiritual items of the USD-4D in a population of Dutch patients in the palliative phase of their illness.
Design:
A multiple method study was performed consisting of a cross-sectional survey and an observational cohort study.
Participants:
The study population consisted of (a) healthcare providers working with patients in the palliative phase and (b) a cohort of patients with a life limiting illness in all settings supplemented by a cohort of hospice patients.
Results:
At least 80% of participants positively assessed the items comprehensibility and relevance. About half of the respondents indicated that certain items are missing from the USD-4D. A qualitative analysis of missing topics revealed either topics for monitoring over time or topics underlying the constructs included. For every item, at least 75% of hypotheses were confirmed. One hypothesis for the item "I can let my loved ones go" was rejected.
Conclusions:
This study confirmed the content and construct validity on the socio-spiritual items of the USD-4D. Hence, the USD-4D is a validated PROM suitable to be structurally used in clinical palliative care to signal, monitor and to go into dialogue about social and spiritual aspects of patients' values, wishes, and needs.
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