The Validity and Reproducibility of a Work Productivity and Activity Impairment Instrument

  title={The Validity and Reproducibility of a Work Productivity and Activity Impairment Instrument},
  author={Margaret C. Reilly and Arthur S. Zbrozek and Ellen M. Dukes},
The construct validity of a quantitative work productivity and activity impairment (WPAI) measure of health outcomes was tested for use in clinical trials, along with its reproducibility when administered by 2 different methods. 106 employed individuals affected by a health problem were randomised to receive either 2 self-administered questionnaires (self administration) or one self-administered questionnaire followed by a telephone interview (interviewer administration). Construct validity of… CONTINUE READING
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