Ultrasound Assessment of Synovial Thickness of Some of the Metacarpophalangeal Joints of Hand in Rheumatoid Arthritis Patients and the Normal Population

Table 1

Optimal cut-offs to distinguish between the synovial thickness of the healthy and pathological joints.

MCP joint	Synovial thickness (mm)	Sensitivity (%)	Specificity (%)
Radial right 2nd MCP joint	1.72	90	96.7
Radial left 2nd MCP joint	1.50	90	96.7
Radial right 3rd MCP joint	1.35	93	100
Radial left 3rd MCP joint	1.46	90	93.7
Ulnar right 4th MCP joint	1.06	53	96.7
Ulnar left 4th MCP joint	1.15	70	96.7