Table 1.

The primary diagnoses

Aetiology	Number of patients	Percentage	Average age (yrs)	Male:Female ratio
Idiopathic	206	38.4	12.57	110:96
Congenital	105	19.6	9.37	59:46
Blount’s disease	46	8.6	9.47	28:18
Metabolic (rickets)	30	5.6	12.13	16:14
Multiple exostoses	26	4.8	12.71	19:7
Post-traumatic	25	4.7	11.64	18:7
Syndrome	21	3.9	12.52	7:14
Skeletal dysplasia	20	3.7	11.14	12:8
Others*	58	10.6

^*Others include: Post-tumour resection, mucopolysaccharidosis, Marfan, trisomy 21, post-surgery, cerebral palsy, post-infectious, idiopathic hemihypertrophy.