Journal
SCANDINAVIAN JOURNAL OF PAIN
Volume 22, Issue 1, Pages 1-13Publisher
WALTER DE GRUYTER GMBH
DOI: 10.1515/sjpain-2021-0154
Keywords
anger; chronic primary pain; meta-analysis; perceived injustice; systematic review
Categories
Funding
- Japan Agency for Medical and Development (AMED), Japan [JP19ek0610019]
- Astellas Foundation for Research on Metabolic Disorders
- Japan Society for the Promotion of Science Overseas Research Fellowships
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This study summarized the associations between anger and pain outcomes in individuals with chronic primary pain, finding that most anger-related variables are significantly positively correlated with pain and disability, with small to moderate effect sizes. Particularly, associations with perceived injustice were substantial.
Objectives: Anger is a negative emotion characterized by antagonism toward someone or something, is rooted in an appraisal or attribution of wrongdoing, and is accompanied by an action tendency to undo the wrongdoing. Anger is prevalent in individuals with chronic pain, especially those with chronic primary pain. The associations between anger and pain-related outcomes (e.g., pain intensity, disability) have been examined in previous studies. However, to our knowledge, no systematic review or meta-analysis has summarized the findings of anger-pain associations through a focus on chronic primary pain. Hence, we sought to summarize the findings on the associations of anger-related variables with pain and disability in individuals with chronic primary pain. Methods: All studies reporting at least one association between anger-related variables and the two pain-related outcomes in individuals with chronic primary pain were eligible. We searched electronic databases using keywords relevant to anger and chronic primary pain. Multiple reviewers independently screened for study eligibility, data extraction, and methodological quality assessment. Results: Thirty-eight studies were included in this systematic review, of which 20 provided data for meta-analyses (2,682 participants with chronic primary pain). Of the included studies, 68.4% had a medium methodological quality. Evidence showed mixed results in the qualitative synthesis. Most anger-related variables had significant positive pooled correlations with small to moderate effect sizes for pain and disability. Conclusions: Through a comprehensive search, we identified several key anger-related variables associated with pain-related outcomes. In particular, associations with perceived injustice were substantial.
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