Table 2.

Comparison of Harris scores between three groups before and after surgery

Group	Number of cases	Harris socre		D-value
		Preoperative	6 months-post
A	12 (12 hips)	64.26 ± 8.17	80.03 ± 5.21△	15.78 ± 8.73*
B	12 (13 hips)	66.40 ± 9.52	77.34 ± 5.15△	10.94 ± 7.64
C	12 (12 hips)	67.29 ± 5.54	76.03 ± 3.89△	8.74 ± 6.18

All data were in accordance with normal distribution. The preoperative and postoperative differences were compared by one-way ANOVA, and multiple comparisons were made by LSD method; The Harris scores were compared before and 6 months after surgery using paired t-tests. ^△Compared with preoperative results, P < 0.01;* Compared with the other two groups, P < 0.01