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The Pain Impact Inventory--further validation in various subgroups.
Ulf Jakobsson1, Jimmie Kristensson
1Lund University, Sweden. Ulf.Jakobsson@med.lu.se
Pain Practice : the Official Journal of World Institute of Pain
|October 20, 2011
Summary
The Pain Impact Inventory (PII) demonstrates strong psychometric properties, including construct validity and reliability, across diverse patient subgroups. This evaluation confirms its suitability for assessing chronic pain impacts in varied populations.
Area of Science:
- Psychometrics
- Pain Medicine
- Health Outcomes Research
Background:
- The Pain Impact Inventory (PII) is an instrument used to assess the impact of chronic pain.
- Further psychometric evaluation is crucial for validating assessment tools across diverse populations.
Purpose of the Study:
- To psychometrically evaluate the "Pain Impact Inventory" (PII) in various subgroups.
- To assess the construct validity and reliability of the PII.
Main Methods:
- 384 individuals with chronic pain (aged 18-102) participated.
- Construct validity assessed via item-total correlation, floor/ceiling effects, and item response rate.
- Reliability evaluated using test-retest (2-week interval) and Cronbach's alpha across gender, age, and pain location subgroups.
Main Results:
- Item-total correlations exceeded 0.30 for most items across all subgroups.
- Test-retest kappa coefficients were significant (P < 0.001), ranging from 0.482 to 0.879.
- Cronbach's alpha values ranged from 0.80 to 0.94 for factors 1-4, with F5 showing lower alpha.
Conclusions:
- The PII exhibits satisfactory psychometric properties for construct validity and reliability.
- The instrument is validated for use across different genders, age groups, and primary pain locations.
- The PII is a reliable tool for measuring chronic pain impact in diverse patient populations.
