Further validation of a questionnaire to assess flare in psoriatic arthritis: determination of cut-off and longitudinal change
Objective The previously developed FLARE questionnaire assesses the multidimensional aspects of a flare of psoriatic arthritis (PsA). We aimed to further validate this questionnaire. Methods Reanalysis of data from the ReFLAP study ( NCT03119805 ), a longitudinal observational s…