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Patient Impairment Lexicon: a validation study
C A Leucht1, J P Bjorck, L L Klewicki
1Fuller Theological Seminary, Pasadena, CA 91101, USA.
Journal of Clinical Psychology
|June 16, 2000
Summary
The Patient Impairment Lexicon (PIL) demonstrated higher rater accuracy than DSM-III-R diagnoses for assessing behavioral health conditions. This supports its use in managed behavioral health organizations.
Area of Science:
- Psychiatry
- Psychometrics
- Health Services Research
Background:
- Managed behavioral health organizations (MBHOs) require standardized diagnostic language for effective patient care.
- The Patient Impairment Lexicon (PIL) was developed to provide a standardized measure of impairment.
- Previous psychometric assessments of the PIL have been conducted.
Purpose of the Study:
- To evaluate the construct validity of the Patient Impairment Lexicon (PIL).
- To compare the accuracy of the PIL with traditional diagnostic methods.
Main Methods:
- Sixteen raters assessed 20 patient vignettes using impairment inventories, DSM-III-R diagnoses, and independent psychiatric functioning measures.
- Construct validity was assessed through correlations between PIL impairments and psychiatric functioning.
- Analyses controlled for rater experience and vignette imaginability.
Main Results:
- Rater accuracy was significantly higher for PIL impairments compared to DSM-III-R diagnoses.
- Positive correlations were observed between PIL impairments and psychiatric functioning across vignettes.
- Significant correlations persisted after controlling for confounding variables.
Conclusions:
- The PIL exhibits strong construct validity and offers superior accuracy over DSM-III-R diagnoses for impairment assessment.
- Findings support the application of the PIL within MBHO settings.
- Further research is recommended to explore additional applications and psychometric properties of the PIL.