Table 7.
Radiographic 5-year outcome (modified Stulberg classification) according to the number of risk factors and age at diagnosis in patients with more than 50% femoral head necrosis
| Radiographic outcome (modified Stulberg classification) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Age < 6.0 years (n = 124) | Age > 6.0 years (n = 51) | |||||||||||
| Number of risk factors a | Good | Fair | Poor | Good | Fair | Poor | ||||||
| n | % | n | % | n | % | n | % | n | % | n | % | |
| 0 | 30 | 79 | 7 | 18 | 1 | 3 | ||||||
| 1 | 15 | 65 | 6 | 26 | 2 | 9 | 10 | 67 | 4 | 27 | 1 | 7 |
| 2 | 15 | 35 | 18 | 43 | 9 | 21 | 7 | 64 | 3 | 27 | 1 | 9 |
| 3 | 5 | 24 | 10 | 48 | 6 | 28 | 0 | 0 | 6 | 43 | 8 | 57 |
| 4 | 0 | 0 | 1 | 9 | 10 | 91 | ||||||
a Risk factors: Catterall group 4, lateral pillar group C, age over 6.0 years, and femoral head cover of < 80%.