Development and Testing of a Short Form of the Patient Activation Measure
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Date
2005-07-25
Authors
Hibbard, Judith H.
Mahoney, Eldon R.
Stockard, Jean
Tusler, Martin
Journal Title
Journal ISSN
Volume Title
Publisher
Wiley
Abstract
Objective: The Patient Activation Measure (PAM) is a 22-item measure that assesses
patient knowledge, skill, and confidence for self-management. The measure was developed using Rasch analyses and is an interval level, unidimensional, Guttman-like
measure. The current analysis is aimed at reducing the number of items in the measure
while maintaining adequate precision.
Study Methods: We relied on an iterative use of Rasch analysis to identify items that
could be eliminated without loss of significant precision and reliability.With each item
deletion, the item scale locations were recalibrated and the person reliability evaluated
to check if and how much of a decline in precision of measurement resulted from the
deletion of the item.
Data Sources: The data used in the analysis were the same data used in the development
of the original 22-item measure. These data were collected in 2003 via a telephone
survey of 1,515 randomly selected adults.
Principal Findings: The analysis yielded a 13-item measure that has psychometric
properties similar to the original 22-item version. The scores for the 13-item measure
range in value from38.6 to 53.0 (on a theoretical 0–100 point scale). The range of values
is essentially unchanged from the original 22-item version. Subgroup analysis suggests
that there is a slight loss of precision with some subgroups.
Conclusions: The results of the analysis indicate that the shortened 13-item version is
both reliable and valid.
Description
13 pages
Keywords
Patient Activation, Self-management, Consumer Roles in Health Care
Citation
Hibbard, J. H., Stockard, J., Mahoney, E. R., & Tusler, M. (2004). Development and Testing of a Short Form of the Patient Activation Measure. Health Services Research, 40(6), 1918- 1930. https://doi.org/10.1111/j.1475-6773.2005.00438.x