Table 2.

Best‐fitted Cox regression model analysis results for clinical flare outcome^*

Disease	HR (95% CI)	P †
JIA subtype‡		0.34
Extended oligoarticular	1.45 (0.71, 2.99)	–
Polyarticular RF–/RF+	1.95 (0.94, 4.06)	–
Systemic	1.26 (0.47, 3.36)	–
Subclinical synovitis: yes§	2.45 (1.31, 4.59)	0.003

^*95% CI = 95% confidence interval; HR = hazard ratio; JIA = juvenile idiopathic arthritis; RF–/RF+ = negative/positive rheumatoid factor.

^†By likelihood ratio test.

^‡Reference category: persistent oligoarticular JIA.

^§Reference category: no.