Joint Involvement in Primary Sjögren’s Syndrome: An Ultrasound “Target Area Approach to Arthritis”

Table 3

Presence of power Doppler signals in the study groups.

Joint	Primary Sjögren’s syndrome (𝑛=17)	Secondary Sjögren’s syndrome (𝑛=18)	𝑃 value*	No-Sjögren controls (𝑛=17)	𝑃 value**
1st MCP	0	1	ns	0	ns
2nd MCP	0	3	ns	0	ns
3rd MCP	0	4	ns	0	ns
4th MCP	0	2	ns	1	ns
5th MCP	0	1	ns	0	ns
1st IP	0	0	ns	0	ns
2nd PIP	0	0	ns	0	ns
3rd PIP	0	0	ns	0	ns
4th PIP	0	0	ns	0	ns
5th PIP	0	0	ns	0	ns
Wrist	2	8	ns	3	ns
Elbow	1	0	ns	0	ns
Knee	1	0	ns	2	ns
Ankle	0	0	ns	0	ns

∗Differences between patients with primary and secondary Sjögren’s syndromes.
**Differences between patients with primary Sjögren’s syndrome and no-Sjögren controls.
Abbreviations: MCP: metacarpophalangeal joints; IP: interphalangeal joint; PIP: proximal interphalangeal joints; PD: power Doppler signal.