Table 3

Correlation between RAID NRS and the scores of the reference instruments

RAID NRSMean (SD)Reference instrumentMean*(SD)Spearmans’ correlations
(95% CI)
Pain4.8 (2.7)MOS-SF36 Bodily Pain4.9 (2.6)0.81 (0.77 to 0.85)
Function4.6 (2.7)mHAQ1.9 (1.9)0.75 (0.71 to 0.79)
Fatigue4.7 (2.8)MOS-SF36 Vitality4.6 (2.1)0.66 (0.60 to 0.71)
Emotional
well-being
3.9 (2.6)MOS-SF36 Emotional6.3 (2.1)0.62 (0.56 to 0.68)
Physical
well-being
4.5 (2.5)MOS-SF36 Physical4.9 (2.6)0.68 (0.63 to 0.73)
Sleep3.8 (2.9)MOS Sleep3.8 (2.7)0.69 (0.64 to 0.73)
Coping3.9 (2.6)Helplessness3.9 (2.7)0.65 (0.58 to 0.72)
  • 95% CI, obtained through bootstrapping method.

  • *Standardised in a scale 0 to 10.

  • mHAQ, modified Health Assessment Questionnaire; MOS-SF36, Medical Outcome Study Short Form 36 Item; NRS, numeric rating scale; RAID, rheumatoid arthritis impact of disease.