Table 3: Stage of severity and prognosis.

Severity's grade Frequency * Prognostic¶
According to Southwick head shaft angle (SHSA) (ref…)
Mild displacement <30 degrees compared with the unaffected side 40 3%
Moderate displacement between 30 and 50 degrees compared with the unaffected side 51 15.5%
Severe displacement > 50 degrees compared with the unaffected side 9 14.2%
According to Wilson (ref)£
Mild displacement of the epiphysis < 1/3 of the diameter of the
femoral neck
Moderate displacement of the epiphysis is > 1/3 but < ½ of the diameter of the femoral neck
Severe displacement of the epiphysis > ½ of the diameter of the femoral neck

Rebich et al. [17]; ‡xxxx; £xxx