Jadas app for iPhone and iPad

This App is a tool that must be used by health care professionals , for non-health care professionals or patients please consult your physician if you use this tool.
The JADAS includes 4 measures:
PhGA: physician global assessment of disease activity (physician global assessment of disease activity, measured on a 10cm visual analog scale (VAS) where 0 = no activity and 10 = maximum activity
Pa/ChGA: parent/patient global assessment of well being (parent/patient global assessment of well being, measured on a 10 cm VAS where 0 = very well and 10 = very poor). 21-numbered circle visual analog scales (VAS)
AJC: Active joint count
ESR/CRP: Erythrocyte Sedimentation Rate.
These variables are part of the American College of Rheumatology (ACR) Pediatric 30 (Pedi 30), Pedi 50, and Pedi 70 criteria for improvement. Validation analyses were conducted on >4,500 patients and included assessment of construct validity, discriminant validity, and responsiveness to change.
Three versions of the JADAS were tested based on 71 joint (range 0– 101), 27 joint (range 0–57), or 10 joint (range 0–40) counts.
Statistical performances of the JADAS were compared with those of 2 rheumatoid arthritis composite scores, the Disease Activity Score in 28 joints (DAS28) and the Clinical Disease Activity Index (CDAI).