Reference Identification

Validity, reliability and responsiveness of the Work Productivity and Activity Impairment Questionnaire in ankylosing spondylitis

Rheumatology, Margaret C. Reilly dis 2010; 49:812-9
Country: Multinational
Language: English
http://www.ncbi.nlm.nih.gov/pubmed/20100797

http://www.ncbi.nlm.nih.gov/pubmed/10146874

The validity and reproducibility of a work productivity and activity impairment instrument.

https://pubmed.ncbi.nlm.nih.gov/25173795/

Predictors of presenteeism and activity impairment outside work in patients with spondyloarthritis

Validity and reliability of Work Productivity and Activity Impairment among patients with axial spondyloarthritis in Singapore.

Linguistic Validation of the US Spanish Work Productivity and Activity Impairment Questionnaire General Health Version (WPAI:GH)