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Table 1 Comparison of general demographic data and preoperative malformation between the guide plate group and the conventional group

From: Application of 3D-printed osteotomy guide plates in proximal femoral osteotomy for DDH in children: a retrospective study

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

  1. *Fisher's precision probability test