Co-morbidity | Number of patients (%) |
Sequelae of hip arthritis, developmental dysplasia of the hip, Legg-Calvé-Perthes disease | 9 (50) |
Cerebral anoxic lesions | 2 (11.1) |
Ewing’s sarcoma | 2 (11.1) |
Gorlin’s syndrome | 2 (11.1) |
Osteogenesis imperfecta | 1 (5.6) |
Psychomotor deficiency | 1 (5.6) |