Validity of the rheumatoid arthritis impact of disease (RAID) score and definition of cut-off points for disease activity states in a population-based European cohort of patients with rheumatoid arthritis.

@article{Salaffi2018ValidityOT,
  title={Validity of the rheumatoid arthritis impact of disease (RAID) score and definition of cut-off points for disease activity states in a population-based European cohort of patients with rheumatoid arthritis.},
  author={Fausto Salaffi and Marco Di Carlo and Jelena Vojinovi{\'c} and Angela Tincani and Alberto Sulli and Stefano Soldano and Laura Andreoli and Francesca Dall'Ara and Ruxandra Ionescu and Katarina Simi{\'c} Pa{\vs}ali{\'c} and Ineta Bal{\vc}une and Iv{\'a}n Ferraz-Amaro and Malgorzata Tlustochowicz and Irena Butrimiene and Egle Punceviciene and Natalia Toroptsova and Simeon Grazio and Jadranka Morovi{\'c}-Vergles and Pavol Masaryk and Kati Otsa and Miguel Bernardes and Vladimira Boyadzhieva and Maurizio Cutolo},
  journal={Joint, bone, spine : revue du rhumatisme},
  year={2018},
  volume={85 3},
  pages={317-322}
}
OBJECTIVES To assess the validity of the rheumatoid arthritis impact of disease (RAID) for measuring disease activity of rheumatoid arthritis (RA) and to determine cut-off values for defining the disease activity states. METHODS A total of 622 RA patients from an European database have been included. Cross-validation was based on assessment of convergent and discriminant validity. Optimal cut-offs were determined against external criteria by calculating the respective 25th and 75th… CONTINUE READING