Introduction: Psoriasis is a chronic autoimmune disease that affects the skin, nails, and musculoskeletal system. Musculoskel- etal involvement, called psoriatic arthritis occurs in 10-25% of patients with psoriasis and can lead to disability if left untreated. Early detection and intervention of psoriatic arthritis has been shown to decrease morbidity. The Psoriasis Epidemiology Screening Tool (PEST) may detect the presence of psoriatic arthritis and has been validated in differ- ent countries. Currently, there is no Filipino version. Objectives: To translate, adapt, and validate PEST in Filipino language. Methods: In the first part of the study, PEST was translated and culturally adapted into Filipino. It was pretested in 30 participants. Three experts then assessed its content and face validity. After the content and face validity were met, 115 participants an- swered the Filipino version of the PEST questionnaire. Results: The Filipino version of the PEST questionnaire was comprehensible, clear and appropriate. All questions were relevant. Some words were edited per expert recommendation. One hundred fifteen adult patients were asked to answer the question- naire. It showed good reliability at 94%. Conclusion The Filipino Version of the PEST was found to be reliable and valid. Larger samples to determine the tool’s applica- bility is recommended.
Psoriasis