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Table 4 Convergent validity: Correlations between WPAI domains and criterion measures of disease activity

From: Psychometric validation of the work productivity and activity impairment questionnaire in ulcerative colitis: results from a systematic literature review

 

WPAI Domain

Study

Criterion Measure

Absenteeism

Presenteeism

OWI

Activity Impairment

Jackson 2016 [38]

SCCAI

–

0.76

0.85

0.83

Mandel 2014 [32]

Partial Mayo score

0.45

0.51

0.60

0.37

Yarlas 2014 [41]

UC-DAI

0.32

0.34

0.42

0.43

Median correlation

0.39

0.51

0.60

0.43

  1. OW, Overall Work Impairment; SCCAI Simple Clinical Colitis Activity Index; UC-DAI Ulcerative Colitis – Disease Activity Index; WPAI Work Productivity and Activity Impairment questionnaire
  2. -- Value not reported
  3. Values printed in BOLD indicate correlations satisfying the definition of convergent validity (≥|0.40|) [24]