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Table 2 Interobserver reliability

From: The value of ultrasonography in predicting arthritis in auto-antibody positive arthralgia patients: a prospective cohort study

 

Weighted Kappa (95% CI)*

Kappa (95% CI)†

Overall agreement†

Joint effusion

0.22 (0.10-0.43)

0.23 (0.00-0.63)

92%

Synovitis

0.47 (0.23-0.70)

0.46 (0.24-0.67)

88%

Power Doppler

0.67 (0.46-0.91)

0.56 (0.34-0.77)

91%

Tenosynovitis

‡

‡

91%

  1. * weighted kappa values were calculated for ordinal data, † kappa values and overall agreement were calculated for dichotomized data, ‡ kappa values could not be calculated, because one observer did not score any abnormalities.
  2. CI, confidence interval.
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Arthritis Research & Therapy

ISSN: 1478-6362

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