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      Development and Testing of a Short Form of the Patient Activation Measure

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      Health Services Research

      Wiley

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          Abstract

          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. 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. 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 from 38.6 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. The results of the analysis indicate that the shortened 13-item version is both reliable and valid.

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          Stages and processes of self-change of smoking Toward an integrative model of change

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            Author and article information

            Journal
            Health Services Research
            Health Serv Res
            Wiley
            0017-9124
            1475-6773
            December 2005
            December 2005
            : 40
            : 6p1
            : 1918-1930
            Article
            10.1111/j.1475-6773.2005.00438.x
            1361231
            16336556
            © 2005

            http://doi.wiley.com/10.1002/tdm_license_1.1

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