4.4 Article

The Importance of the Treatment Rationale for Pain in Animal-Assisted Interventions: A Randomized Controlled Trial in Healthy Participants

期刊

JOURNAL OF PAIN
卷 24, 期 6, 页码 1080-1093

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CHURCHILL LIVINGSTONE
DOI: 10.1016/j.jpain.2023.01.004

关键词

Meaning; expectation; mechanism; placebo; contextual factor

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Animal-assisted interventions (AAIs) have promising analgesic effects on pain perception when integrated into the treatment rationale. A randomized controlled trial involving 128 healthy participants found that participants who received dog treatment experienced significantly less unpleasantness and lower intensity of pain compared to those who received no treatment. This study highlights the importance of providing a treatment rationale in AAIs for pain.
Animal-assisted interventions (AAIs) is a promising treatment approach for pain, but possible mechanisms still need to be elucidated. This study set out to investigate the analgesic effects of an animal provided with a treatment rationale in a randomized controlled trial employing a standardized experimental heat-pain paradigm. We randomly assigned 128 healthy participants to: dog treatment (DT), placebo treatment (PT), dog and placebo treatment (DPT), and no treatment (NT). Primary outcomes were heat-pain tolerance and the corresponding self-reported ratings of pain unpleasantness and intensity. Results revealed no differences in heat-pain tolerance between the conditions. However, participants in the DT condition experienced heat-pain as significantly less unpleasant at the limit of their tolerance compared to participants in the NT condition (estimate = -0.96, CI = -1.58 to 0.34, P = .010). Participants in the DT condition also showed lower ratings of pain intensity at the limit of their tolerance compared to participants in the NT condition (estimate = -0.44, CI = -0.89 to 0.02, P = .060). This study indicates that a dog has analgesic effects on pain perception when integrated into the treatment rationale. We assume that providing a treatment rationale regarding the animal is important in AAIs for pain. Perspective: This study shows that the presence of an animal is not sufficient for animal-assisted interventions (AAIs) to have an analgesic effect on pain unless they are provided with a treatment rationale. This could imply that not only the animal but also contextual factors are important in AAIs. Trial registration: Clinical Trials NCT04361968. (c) 2023 The Author(s). Published by Elsevier Inc. on behalf of United States Association for the Study of Pain, Inc. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

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