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Table 2 Demographics and fracture characteristics by CN difference

From: Does nail size or difference between canal and nail diameter influence likelihood of union or time to union of femoral shaft fractures treated with intramedullary nailing? A retrospective cohort study

 

CN difference

P value

Group 1

 < 1 mm

Group 2

1-2 mm

Group 3

 > 2 mm

Sample size

143

79

35

 

Age

32.9 ± 16.1

35.1 ± 18.8

32.4 ± 16.4

0.614

Age > 50

24(16.8%)

17(21.5%)

5(14.3%)

0.566

Gender

 F

54(37.8%)

34(43%)

7(20%)

0.060

 M

89(62.2%)

45(57%)

28(80%)

 

A/R

 A

135(94.4%)

75(94.9%)

32(91.4%)

0.749

 R

8(5.6%)

4(5.1%)

3(8.6%)

 

Nail size

 10 mm

59(41.3%)

38(48.1%)

16(45.7%)

0.601

 11 mm

39(27.3%)

26(32.9%)

9(25.7%)

0.614

 12 mm

37(25.9%)

11(13.9%)

6(17.1%)

0.093

 13 mm

8(5.6%)

4(5.1%)

4(11.4%)

0.404

AO/OTA 32

 32A

128(89.5%)

55(69.6%)

23(65.7%)

 < 0.001

 32B

15(10.5%)

24(30.4%)

12(34.3%)

 

BMI

24 ± 5.3

25.3 ± 12.3

23.6 ± 3.6

0.443

 BMI > 30

19(13.3%)

11(13.9%)

1(2.9%)

0.196

Smoking

39(27.3%)

17(21.5%)

8(22.9%)

0.609

Alcohol

32(22.4%)

15(19%)

7(20%)

0.828

DM

7(4.9%)

3(3.8%)

2(5.7%)

0.888

Union time

5.7 ± 2.1

5.8 ± 2.3

5.7 ± 2.3

0.889

Nonunion

3(2.1%)

5(6.3%)

0(0%)

0.115