Validity and reliability of the short form brief pain inventory in older adults with nociceptive, neuropathic and nociplastic pain.

Objective: The aim of this study was to evaluate the validity and reliability of the Short Form Brief Pain Inventory (SF-BPI) for community-dwelling Brazilian older adults with chronic neuropathic, nociceptive and nociplastic pain.

Methods: Cross-sectional psychometric testing was conducted in a convenience sample, n=114 (66.5 ± 4.9 years).

Results: The 2-factor structure of the SF-BPI was ratified by confirmatory factor analysis. Convergent validity was found between the SF-BPI and the Present Pain Intensity (PPI). There was good overall internal consistency (Cronbach's α: 0.87). Test-retest reliability was excellent for pain intensity and interference scores of the SF-BPI (ICC: 0.90 and 0.96, respectively), as well as inter-rater reliability for both dimensions (ICC: 0.77).

Conclusion: The findings support the validity and reliability of the SF-BPI for community-dwelling older adults with chronic pain and may contribute to health professionals having a brief multidimensional assessment for more effective therapeutic approaches in this population.