Assessing how individuals conceptualize numeric pain ratings: validity and reliability of the Pain Schema Inventory (PSI-6) Short Form.
| Autor: | Wiederien, Robert C., Wang, Dan, Frey-Law, Laura A. |
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| Předmět: |
PAIN measurement
PEARSON correlation (Statistics) SECONDARY analysis CHRONIC pain CRONBACH'S alpha DATA analysis RESEARCH funding QUESTIONNAIRES RESEARCH methodology evaluation RESEARCH evaluation RETROSPECTIVE studies SEVERITY of illness index DESCRIPTIVE statistics RESEARCH methodology TEST validity STATISTICAL reliability ANALYSIS of variance STATISTICS DATA analysis software |
| Zdroj: | Frontiers in Pain Research; 2024, p01-10, 10p |
| Abstrakt: | Background: While numeric scales to represent pain intensity have been well validated, individuals use various conceptualizations when assigning a number to pain intensity, referred to as pain rating schema. The 18-item Pain Schema Inventory (PSI-18) quantifies pain rating schema by asking for numeric values for multiple mild, moderate or severe pain conditions. This study aimed to assess the validity and reliability of a shortened form of the PSI, using only 6 items (PSI-6). Methods: A secondary analysis was performed on two existing datasets. The first (n = 641) involved a community-based population that completed the PSI-18. The second (n = 182) included participants with chronic pain who completed the PSI-6 twice, one week apart. We assessed face validity, convergent validity, offset biases, test-retest reliability, and internal consistency of the PSI-6 compared to the PSI-18. Results: Both the PSI-18 and PSI-6 demonstrated excellent face validity. The PSI-6 demonstrated excellent convergent validity relative to the PSI-18, with correlations from r = 0.88 to 0.92. Bland-Altman plots revealed offset biases near zero (< 0.22 on 0-10 scale) across all categories of mild, moderate, severe and average pain. Internal consistency was excellent, with Cronbach's Alpha = 0.91 and 0.80, for PSI-18 and PSI-6 respectively. Test-retest reliability of the PSI-6 was high with correlations from r = 0.70-0.76. Conclusion: The PSI-6 is a valid and reliable tool to assess pain rating schema with reduced subject burden, to better interpret individuals' pain ratings and adjust for inter-individual variability. [ABSTRACT FROM AUTHOR] |
| Databáze: | Complementary Index |
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