Table 4.

Intra-rater reliability of Skin Assessment Tool Scores in JDM patients among pediatric specialists^*

	Within pediatric dermatologists (n=5)	Within pediatric rheumatologists (n=5)	Within pediatric neurologists (n=5)
CDASI
Activity	0.90 (0.78–1.00)	0.91 (0.79–1.00)	0.65 (0.29–1.00)
Damage	0.97 (0.94–1.00)	0.64 (0.27–1.00)	0.78 (0.53–1.00)
CAT-BM
Activity	0.86 (0.70–1.00)	0.88 (0.74–1.00)	0.91 (0.80–1.00)
Damage	0.93 (0.85–1.00)	0.73 (0.44–1.00)	0.89 (0.76–1.00)
Skin PGA
Activity	0.95 (0.90–1.00)	0.50 (0.03–0.96)	0.83 (0.64–1.00)
Damage	0.84 (0.66–1.00)	0.55 (0.12–0.98)	0.96 (0.91–1.00)

^*Intra-class correlation coefficients (95% C.I.)

Abbreviations: CDASI: Cutaneous Dermatomyositis Disease Area and Severity Index; CAT-BM: Cutaneous Assessment Tool-Binary Method; PGA: Physician Global Assessment

Summary: The intra-rater agreement was excellent for pediatric dermatologists using the CDASI and CAT-BM measures, and the intra-rater agreement was good to excellent for pediatric rheumatologists and neurologists using the same outcome instruments.