Table 3.

Clinical efficacy evaluation of the 4 groups of patients before and at the last follow-up.

Group	Harris hip score		t	P
	Preoperative	Last follow-up
Group A (n = 20, 20 hips)	32.39 ± 14.66	92.33 ± 4.75	18.942	≤0.001
Group B (n = 19, 20 hips)	30.25 ± 18.79	94.13 ± 4.25	16.916	≤0.001
Group C (n = 19, 20 hips)	31.53 ± 20.13	94.25 ± 3.10	14.907	≤0.001
Group D (n = 20, 20 hips)	31.61 ± 18.88	94.30 ± 2.61	14.688	≤0.001