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Table 2 Patient and fracture characteristics by occurrence of complications

From: Analysis of risk factors for complications after femoral neck fracture in pediatric patients

Characteristics

n (%)* or mean ± SD (range)

AVN (n = 14)

No. AVN (n = 30)

p

Cox vara (n = 4)

No. vara (n = 40)

p

Nonunion (n = 2)

p

Preclosure (n = 7)

p

Sex

  

1.000

  

1.000

 

1.000

 

1.000

 Female

5 (36)

12 (40)

 

1 (25)

16 (40)

 

1 (50)

 

3 (43)

 

 Male

9 (64)

18 (60)

 

3 (75)

24 (60)

 

1 (50)

 

4 (57)

 

Age

9.57 ± 3.16 (5–14)

8.73 ± 3.92 (2–14)

0.454

8.50 ± 3.70 (5–13)

9.05 ± 3.72 (2–14)

0.792

11.5 ± 2.12 (10–13)

0.303

9.43 ± 2.99 (6–13)

0.701

Injury mechanism

  

0.817

  

1.000

 

1.000

 

0.613

 Sports-related injury

8 (57)

18 (60)

 

2 (50)

24 (60)

 

2 (100)

 

3 (43)

 

 Fall from height

4 (29)

6 (20)

 

1 (25)

9 (23)

 

0 (0)

 

2 (29)

 

 Car accident

2 (14)

6 (20)

 

1 (25)

7 (18)

 

0 (0)

 

2 (29)

 

Delbet type

  

0.019

  

0.662

 

1.000

 

0.335

 I

1 (7)

0 (0)

 

0 (0)

1 (3)

 

0 (0)

 

0 (0)

 

 II

11 (79)

14 (47)

 

3 (75)

22 (55)

 

1 (50)

 

6 (86)

 

 III

2 (14)

16 (53)

 

1 (25)

17 (43)

 

1 (50)

 

1 (14)

 

Displaced fracture

13 (93)

24 (80)

0.401

4 (100)

33 (83)

1.000

2 (100)

1.000

6 (86)

1.000

Combined injury

3 (21)

9 (26)

1.000

2 (50)

8 (20)

0.218

0 (0)

1.000

2 (29)

0.649

Surgical reduction within 24 h after injury

1 (7)

6 (20)

0.401

0 (0)

7 (18)

1.000

0 (0)

1.000

0 (0)

0.575

Type of reduction

  

1.000

  

0.302

 

1.000

 

0.654

 Close reduction

4 (29)

9 (30)

 

0 (0)

13 (33)

 

0 (0)

 

1 (14)

 

 Open reduction with capsular decompression

10 (71)

21 (70)

 

4 (100)

27 (68)

 

2 (100)

 

6 (86)

 

Fixation

  

1.000

  

1.000

 

0.508

 

1.000

 Lag screws

10 (71)

21 (70)

 

3 (75)

28 (70)

 

1 (50)

 

5 (71)

 

 Plate and screws

4 (29)

9 (30)

 

1 (25)

12 (30)

 

1 (50)

 

2 (29)

 

Pass epiphysis

5 (36)

2 (7)

0.025

1 (25)

6 (15)

0.513

0 (0)

1.000

3 (43)

0.068

Good Reduction quality

13 (93)

27 (90)

1.000

2 (50)

38 (95)

0.036

1 (50)

0.175

7 (100)

1.000

  1. Bold values are statistically significant p < 0.05
  2. *Patient number with the percentage of patient number in total patient of the column within parentheses