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Table 5 Linear-weighted Kappa coefficients

From: Validation of novel patient-centred juvenile idiopathic arthritis-specific patient-reported outcome and experience measures (PROMs/PREMs)

PROM items

Agreement %

Strength of agreement

(kappa coefficient)

kappa coefficient range

Pain

91

0.71

Substantial (0.61–0.80)

Social wellbeing

91

0.71

Medication side effects

86

0.63

Emotional wellbeing

87

0.62

Fatigue

86

0.57

Moderate (0.41–0.60)

Poor sleep

86

0.50

  1. a Kappa coefficients ranging from 0.50 to 0.71 indicate moderate to substantial test-retest reliability