Construct validity of the modified numeric rating scale of patient global assessment in psoriatic arthritis.

@article{Leung2012ConstructVO,
  title={Construct validity of the modified numeric rating scale of patient global assessment in psoriatic arthritis.},
  author={Ying Ying Leung and K H Ho and Tracy-Yanner Zhu and L O Tam and Emily Wailin Kun and Edmund Kwok-Ming Li},
  journal={The Journal of rheumatology},
  year={2012},
  volume={39 4},
  pages={844-8}
}
OBJECTIVE The construct validity of the patient global health assessment (PGA) in psoriatic arthritis (PsA) has not been analyzed, despite its common use. We evaluated the construct validity of a numeric rating scale (NRS) of the PGA in PsA. METHODS Patients with PsA who fulfilled the ClASsification for Psoriatic ARthritis (CASPAR) criteria were recruited at a tertiary referral center. Demographic data were collected and PGA data were determined from administration of an 11-point NRS (0 to 10… CONTINUE READING