Validation of the Toronto Psoriatic Arthritis Screen II (ToPAS II) questionnaire in a Brazilian population.

The Toronto Psoriatic Arthritis Screen II (ToPAS II) was developed as a tool to screen patients with probable psoriatic arthritis. We aimed to evaluate the validation of the ToPAS II questionnaire in a Brazilian population. The Portuguese translation of the ToPAS II was sent to us by the developer authors of the original index, and adapted to Brazilian Portuguese.