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. 2023 Apr 24;18:315. doi: 10.1186/s13018-023-03801-w

Table 1.

Comparison of general demographic data and preoperative malformation between the guide plate group and the conventional group

General situation Guide plate group (n = 16) Conventional group (n = 20) Statistics P value
Age, years 4.38 ± 0.91 4.58 ± 0.98 t =  − 0.623 0.538
Gender, n (%) * 0.613

Male

Female

1 (6.25)

15 (93.75)

3 (15.00)

17 (85.00)

Side, n (%) * 0.731

Left

Right

11 (68.75)

5 (31.25)

12 (60.00)

8 (40.00)

Tönnis classification,

n (%)

* 0.650

II

III

IV

4 (25.00)

10 (62.50)

2 (12.50)

4 (20.00)

15 (75.00)

1 (5.00)

Preoperative neck-shaft angle, ° 146.49 ± 4.85 147.68 ± 4.04 t =  − 0.801 0.429
Preoperative anteversion angle, ° 45.26 ± 4.25 46.97 ± 4.66 t =  − 1.132 0.266
Follow-up time, years 2.51 ± 0.38 2.70 ± 0.40 t =  − 1.464 0.152

*Fisher's precision probability test