Table 1

Observed (OBS) and adjusted (κadj) agreements between radiologists in rating the presence of OA in 74 complete and 11 incomplete twin pairs participating in the ATR osteoarthritis study (split 0/1,2,3)

Joint areaSpecific featuresIntra-rater (RAD1)Intra-rater (RAD2)Inter-rater
OBSκadjOBSκadjOBSκadj
DIPJSN0.880.750.860.720.860.73
OP0.820.650.910.820.800.60
Global0.810.620.830.670.780.55
PIPJSN0.920.840.910.830.930.85
OP0.890.770.950.890.890.79
Global0.850.690.910.810.860.73
MCPJSN1.000.990.990.991.000.99
OP0.970.940.980.960.970.93
Global0.970.940.980.960.970.94
1st IPJSN0.960.930.980.960.970.94
OP0.850.690.890.780.880.75
Global0.820.650.880.770.860.71
1st CMCJSN0.990.990.990.990.990.99
OP0.780.560.880.770.840.68
Global0.790.580.880.750.830.66
WristJSN0.950.910.960.930.940.89
OP0.920.850.960.930.950.91
Global0.920.850.940.880.930.85
KneeJSN0.790.580.970.940.790.58
OP0.880.770.940.890.910.82
Sclerosis0.920.850.960.930.940.89
Global0.790.580.920.840.770.55
HipJSN0.910.820.940.880.940.87
OP—acetabular0.820.650.750.500.610.22
OP—femoral0.980.970.960.910.970.95
Sclerosis0.970.950.990.970.980.97
Cysts0.980.970.980.960.980.95
Global0.860.730.890.790.880.76