Considerations for evaluating and recommending Worker Productivity Outcome Measures: an update from the OMERACT Worker Productivity Group

Objective: The Outcome Measures in Rheumatology (OMERACT) Worker Productivity Group continues efforts to assess psychometric properties of measures of presenteeism.

Methods: Psychometric properties of single-item and dual answer multiitem scales were assessed, as well as methods to evaluate thresholds of meaning.

Results: Test-retest reliability and construct validity of single item global measures was moderate to good. The value of measuring both degree of difficulty and amount of time with difficulty in multi-items questionnaires was confirmed. Thresholds of meaning vary depending on methods and external anchors applied.

Conclusion: We have advanced our understanding of the performance of presenteeism measures and have developed approaches to describing thresholds of meaning.