PatientsPatients
Prevalence % (min–max)Observed agreement
(min–max)
Kappa (y/n)
+95% CI
(min–max)
Kappa (0–3)
+95% CI
(min–max)
Prevalence % (mean)Observed agreement
(mean)
Mean Kappa (y/n)
+95% CI
Mean Kappa
(0 to 3) +95% CI
GS*Grade 0: 15.6–68.80.53–0.880–0.94 (0–0 to 0.56–1)0.05–0.83 (0.04–0.28 to 0.59–0.89)Grade 0: 38.50.670.31 (0.13 to 0.48)0.43 (0.18 to 0.44)
Grade 1: 16.7–49.5Grade 1: 30.2
Grade 2: 10–53.2Grade 2: 23.6
Grade 3: 0–33.3Grade 3: 7.7
PDGrade 0: 75–89.60.66–0.940.2–0.91 (0–0 to 1–1)0.2–0.89 (0–0.54 to 0–1)Grade 0: 81.00.820.42 (0.17 to 0.63)0.42
Grade 1: 3.1–18.8Grade 1: 10.6
Grade 2: 2.1–16.7Grade 2: 7.3
Grade 3: 0–5.2Grade 3: 1.1
  • Kappa coefficients for assessing the sonographers reliability to detect and scoring synovitis in patients with RA using the OMERACT definition of synovitis (*GS synovitis (synovial hypertrophy, with or without effusion) and PD signal) in static images (on the top of the table) and during live scanning of patients with RA (at the bottom of the table). For the intrareader reliability, the kappa range is listed.  GS, grey-scale; OMERACT, Outcome Measures in Rheumatology; PD, power Doppler; RA, rheumatoid arthritis.