Patients with juvenile idiopathic arthritis in clinical remission with positive power Doppler signal in joint ultrasonography have an increased rate of clinical flare: a prospective study

Table 3 Ultrasonographic data of joints and association with flare after 6 and 12 months of evaluation

	Flare after 6 months (n = 70)	No flare after 6 months (n = 3092)	p	Flare after 12 months (n = 80)	No flare after 12 months (n = 2028)	p
Subclinical synovitis with positive PD signal	5 (7.1%)	14 (0.5%)	<0.001^a	4 (5%)	10 (0.5%)	0.001^a
Subclinical synovitis with or without positive PD signal	10 (14.3%)	59 (1.9%)	<0.001^a	8 (10%)	45 (2.2%)	0.001^a

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