Table 2

Reliability of the definitions of hip osteoarthritis

IntraraterInterraterCut off levelStatisticSizePrevalence(%)Reference
*<2.5 mm used as cut off level;†κ adjusted for prevalence and bias.24
NP, not provided; NA, not applicable (group includes patients with hip pain who consulted the general practitioner); ICC, intraclass correlation coefficient.
Kellgren and Lawrence (0–4)0.75⩾2κ(dichotomous)227NABierma-Zeinstra (1999)12
0.66–0.890.63Intra: Pearson7753.6Hirsch (1998)5
(0.59–0.67)Inter: ICC
0.760.60–0.65⩾2κ(dichotomous)1479.2Ingvarsson (2000)19
0.750.40Correlation coefficient85NPKellgren (1957)7
Croft Grade (0–5)0.810.79NPκNABirrell (2001)20
0.49–0.930.41–0.63⩾3 ⩾4κ(dichotomous)5024.3 (⩾2)Croft (1990)8
11.0 (⩾3)
0.610.37NPκHirsch (1998)5
081NPκ35016.3 (⩾1)MacGregor (2000)21
11.7 (⩾2)
0.610.37⩾3κ40NPSmith (1995)27
MJS according to Croft0.81–0.84NPκ3508*Antoniades (2000)22
0.830.75ICC195NABirrell (2001)20
0.810.70⩽2.5 mmκ(dichotome)5014.4Croft (1990)8
0.830.79⩽1.5 mm2.0
0.850.42NPκHirsch (1998)5
0.940.81/0.96ICC14710Ingvarsson (2000)19
0.84NPκ35010.9MacGregor (2000)21
0.850.42⩽2.5 mmκ40NPSmith (1995)27
ACR criteria (dichotomous)
    Clinical0–0.65 (0.93–0.95†)κ(dichotomous)159NPBellamy (1999)23
    Clin/rad/lab0.31–0.85 (0.91–0.97†)κ(dichotomous)159NPBellamy (1999)23
Index according to Lane0.70/0.880.76/0.850–3ICC3155.5 (right hip ⩾2)Lane (1993)13
0.360.40/0.47⩾1κ36.1 (left hip ⩾2)
0.830.72/0.92⩾2κ
0.870–4ICC407.1 (⩾2)Nevitt (1995)14
0.71⩾2κ904.7 (⩾3)