Table 5.

Ultrasound characteristics by zone of tendon. Values are n (%) unless otherwise specified.

Ultrasound Characteristic	AT Zone^a	Gout, n = 48 Tendons	p
Intratendinous tophus	Zone 1	26 (54.2)	0.07
	Zone 2	25 (52.1)
	Zone 3	12 (25.0)
Intratendinous hyperechoic spots	Zone 1	22 (45.8)	< 0.01^b
	Zone 2	17 (35.4)
	Zone 3	10 (20.8)
Intratendinous power Doppler signal	Zone 1	17 (35.4)	0.60
	Zone 2	15 (31.2)
	Zone 3	17 (35.4)

↵a Zone 1: insertion; zone 2: pre-insertion; zone 3: proximal to pre-insertion.
↵b Pairwise comparisons revealed a significant difference between zone 1 and zone 3 (p < 0.01). AT: Achilles tendon.