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Structural validity of the Chronic Pain Coping Inventory-Brazilian version
Layz Alves Ferreira Souza1, Lilian Varanda Pereira1, Louise Amália de Moura1
1College of Nursing, Federal University of Goiás, Goiânia, Goiás, Brazil.
Plos One
|February 8, 2021
Summary
The Brazilian version of the Chronic Pain Coping Inventory (CPCI) is a valid tool for assessing chronic pain coping in adults. After removing two items, the scale demonstrated good reliability and construct validity.
Area of Science:
- Psychology
- Health Sciences
- Clinical Research
Background:
- The Chronic Pain Coping Inventory (CPCI) is a widely recognized instrument for measuring pain coping strategies.
- The psychometric properties of the Brazilian version of the CPCI have not been previously established.
- Understanding the validity and reliability of the CPCI in a Brazilian context is crucial for its effective clinical application.
Purpose of the Study:
- To evaluate the psychometric properties of the Brazilian version of the Chronic Pain Coping Inventory (CPCI).
- To confirm the validity and reliability of the CPCI for use with chronic pain patients in Brazil.
Main Methods:
- A sample of 705 outpatients experiencing chronic pain was recruited for the study.
- Statistical analyses included Cronbach's alpha for reliability, corrected item-total correlations, and confirmatory factor analysis (CFA) using Diagonally Weighted Least Squares.
- The CFA was employed to assess the construct validity and factor structure of the instrument.
Main Results:
- The confirmatory factor analysis supported the construct validity, with factor loadings ranging from 0.36 to 0.90 across nine factors, aligning with original CPCI factor structures.
- The final model exhibited adequate fit indices (TLI=0.96, CFI=0.96, RMSEA=0.051) after excluding items 42 and 54.
- Eight of the nine CPCI scales demonstrated satisfactory reliability, with Cronbach's alpha values ranging from 0.70 to 0.92. The Relaxation scale showed a lower alpha of 0.53.
Conclusions:
- The Brazilian version of the CPCI, with the exclusion of items 42 and 54, is a valid and reliable instrument for assessing coping mechanisms in Brazilian adults with chronic pain.
- The study provides strong evidence for the psychometric soundness of the adapted CPCI, supporting its use in clinical and research settings within Brazil.
- Further investigation may be warranted to explore the lower reliability observed in the Relaxation scale.
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