Table 1.

Clinical and treatment characteristics of patients

	Characteristics	Number	Percentage
Sex	Male	10	27.8
	Female	26	72.2
Position	Left	23	63.9
	Right	13	36.1
Czerny classification	1a-b	9	25.0
	2a-b	15	41.7
	3a-b	12	33.3
Treatment	Conservative	17	47.2
	Surgery	19	52.8
Age at diagnosis, years	41.6 ± 10.7 (mean ± standard deviation)
JOA score at diagnosis	72.8 ± 18.2 (mean ± standard deviation)
Harris Hip Score at diagnosis	76.9 ± 14.2 (mean ± standard deviation)