Table 4.

Agreement between physician and patient individual joint assessment by kappa statistics.

JointBaselineWeek 12Week 24
Tender JointsSwollen JointsTender JointsSwollen JointsTender JointsSwollen Joints
Shoulder0.490.150.480.170.550.22
Knee0.530.400.500.530.590.55
Elbow0.520.340.610.420.500.25
Wrist0.450.290.480.290.540.22
MCP 10.390.200.450.280.470.17
MCP 20.460.270.510.250.490.28
MCP 30.430.260.470.270.450.23
MCP 40.440.240.430.260.460.20
MCP 50.460.260.390.190.410.20
PIP 10.360.330.390.190.390.25
PIP 20.350.230.380.300.390.22
PIP 30.370.260.510.340.400.22
PIP 40.390.250.440.230.380.20
PIP 50.360.240.430.120.290.08
  • MCP: metacarpophalangeal; PIP: proximal interphalangeal; 1: thumb, 2: index, 3: middle, 4: ring, 5: small. Kappa statistics measure agreement between the 2 counts. A value of 1.0 indicates perfect agreement, 0 indicates the same agreement as expected by chance, and a negative value indicates less agreement than would be expected by chance.