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

Table 4

Presence of bone erosions 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	3	ns	0	ns
2nd MCP	0	7	0.007	0	ns
3rd MCP	0	3	ns	0	ns
4th MCP	0	1	ns	0	ns
5th MCP	0	2	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	3	10	0.03	0	ns
Elbow	0	1	ns	0	ns
Knee	0	1	ns	0	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.