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Table 5 Results according to Kalamchi and MacEwen for osteonecrosis evaluation

From: Analyses of outcomes of one-stage operation for treatment of late-diagnosed developmental dislocation of the hip: 864 hips followed for 3.2 to 8.9 years

  Kalamchi (%) Young Middle Older Total
Absent 89(43.3) 393(68.3) 12(14.7) 494(57.2)  
I 46(22.3) 82(14.2) 5(6.1) 133(15.4)  
II 38(18.4) 74(12.8) 24(29.3) 136(15.7)  
III 25(12.1) 15(2.6) 26(31.7) 66(7.6)  
IV 8(3.9) 12(2.1) 15(18.2) 35(4.1)