Table 1.

Characteristics of the two groups

	Group I	Group II	Statistic	P value	NS
Number of patients	24	24
Male	15	11	X 2 = 1.343	0.247	*
Female	9	13
Mean age(yrs)	52.31 (range,22-83)	54.55 (range,25-78)	t = 0.448	0.657	*
Operation side			X 2 = 2.116	0.146	*
Left	11	16
Right	13	8
Aetiology of indications			X 2 = 1.532	0.655	*
Femoral head necrosis	16	18
Femoral neck fracture	3	4
Primary osteoarthritis	5	2

NS: non-significant. *: P>0.05.