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Table 1 Patients Demographics

From: Preliminary outcomes of the combination of demineralized bone matrix and platelet Rich plasma in the treatment of long bone non-unions

 

DBM+PRP group (n = 16)

Autograft group (n=27)

Statistics

P Value

Sex (male/female), n

7/9

15/12

χ2 = 0.560

0.454a

Age, (years) median, range

39.5,28-61

32, 27-67

Z=-0.972

0.331b

Affected side

  

χ2 = 0.078

0.78a

Right

9

14

  

Left

7

13

  

Causes of injury

  

3.918

0.412c

Traffic accident

6

14

  

Fall

4

9

  

Trip

3

3

  

Sport injury

2

1

  

Machinery accident

1

   

Previous Open fracture

5

9

χ2 = 0.020

0.888a

Number of previous surgeries

  

3.764

0.226c

1

10

19

  

2

5

5

  

3

 

3

  

4

1

   

Location of nonunion site

  

2.492

0.727c

Clavicular

2

2

  

Humeral

2

5

  

Radial

1

   

Femoral

4

9

  

Tibial

7

11

  

Types of non-union (Oligotrophic/ Atrophic)

13/3

20/7

χ2 = 0.027

0.869d

Hardware of the last surgery

  

3.859

0.139c

Intramedullary nail

2

7

  

Plate

14

16

  

External fixation

 

4

  

Chronic disease

    

Hypertension

4

6

χ2 = 0.000

1.000d

Diabetes

3

3

χ2 = 0.059

0.808d

Duration of non-union (months), mean ± SD

15.94±3.75

16.11±4.24

t=-0.135

0.893e

Follow-up period (months), mean ± SD

15.28±2.58

16.30±3.23

t=-0.970

0.338e

  1. Note. a: Pearson’s chi-square test; b: Mann-Whitney U test; c: Fisher’s exact test; d: continuity correction chi-square test; e: independent-samples T test