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Table 2 Comparison of the results of groups B and I

From: Does the contralateral healthy ankle of patient with ipsilateral mechanical lateral ankle laxity show greater lateral ankle laxity? Evaluation of the anterior talofibular ligament by stress ultrasonography

Variables

Group B (n = 154)

Group I (n = 40)

P value

 

Ankle laterality, right/left

154/154

23/17

0.48

 

Anterior drawer test

  

0.08

 

  grade 1, n (%)

250 (81.2)

37 (92.5)

  

  grade 2, n (%)

58 (18.8)

3 (7.5)

  

Ultrasonographic findings

    

  nonstress ATFL length, mm

    

   all ankles

19.4 ± 1.8 (19.2–19.6)

19.3 ± 1.9 (18.7–19.9)

0.84

 
 

range, 15.7–24.6

range, 16.4–23.1

  

   right ankles

19.3 ± 1.8 (19.0-19.6)

19.0 ± 1.7 (18.2–19.6)

0.39

 
 

range, 15.8–23.3

range, 16.5–22.2

  

   left ankles

19.4 ± 1.8 (19.2–19.7)

19.9 ± 2.2 (18.8–20.9)

0.39

 
 

range, 15.7–24.6

range, 16.4–23.1

  

  stress ATFL length, mm

    

   all ankles

20.8 ± 1.8 (20.6–21.0)

20.9 ± 1.9 (20.3–21.5)

0.66

 
 

range, 16.4–26.3

range, 17.5–24.9

  

   right ankles

20.7 ± 1.8 (20.4–21.0)

20.5 ± 1.8 (19.7–21.2)

0.71

 
 

range, 16.7–26.0

range, 17.5–23.6

  

   left ankles

20.9 ± 2.0 (20.6–21.3)

21.5 ± 2.0 (20.5–22.5)

0.22

 
 

range, 16.7–26.0

range, 17.5–23.6

  

  length change, mm

    

   all ankles

1.5 ± 0.6 (1.4–1.5)

1.6 ± 0.6 (1.4–1.8)

0.12

 
 

range, 0.4–3.1

range, 0.5–2.9

  

   right ankles

1.4 ± 0.6 (1.3–1.5)

1.6 ± 0.5 (1.3–1.8)

0.16

 
 

range, 0.4–3.1

range, 0.6–2.6

  

   left ankles

1.5 ± 0.6 (1.4–1.6)

1.6 ± 0.7 (1.3-2.0)

0.40

 
 

range, 0.5–3.1

range, 0.6–2.9

  

  ATFL ratio

    

   all ankles

1.08 ± 0.03 (1.07–1.08)

1.08 ± 0.03 (1.07–1.09)

0.13

 
 

range, 1.02–1.17

range, 1.02–1.16

  

   right ankles

1.07 ± 0.03 (1.07–1.08)

1.08 ± 0.03 (1.07–1.10)

0.15

 
 

range, 1.02–1.17

range, 1.03–1.13

  

   left ankles

1.08 ± 0.03 (1.07–1.08)

1.09 ± 0.04 (1.07–1.10)

0.45

 
 

range, 1.03–1.16

range, 1.02–1.16

  
  1. Data are shown as means ± standard deviations unless otherwise indicated.
  2. The number in the parenthesis shows 95% confidence interval.
  3. Bilateral ankles were included in group B.
  4. Group B, subjects with bilateral healthy ankles; Group I, subjects with ipsilateral mechanical lateral ankle laxity
  5. ATFL ratio, stress ATFL length / nonstress ATFL length.
  6. ADT, anterior drawer test; ATFL, anterior talofibular ligament.