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Table 1 Demographics and fracture characteristics by nail size

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

 

Nail size

P value

10 mm

11 mm

12 mm

13 mm

Sample Size

113

74

54

16

 

 Age

32.7 ± 15.8

34 ± 17.7

32.1 ± 15.8

42 ± 23.7

0.195

 Age > 50

21(18.6%)

14(18.9%)

7(13%)

4(25%)

0.675

Gender

 F

55(48.7%)

24(32.4%)

12(22.2%)

4(25%)

0.004

 M

58(51.3%)

50(67.6%)

42(77.8%)

12(75%)

A/R

 A

103(91.2%)

71(95.9%)

53(98.1%)

15(93.8%)

0.277

 R

10(8.8%)

3(4.1%)

1(1.9%)

1(6.3%)

CN difference

 < 1

59(52.2%)

39(52.7%)

37(68.5%)

8(50%)

0.201

 1 ~ 2

38(33.6%)

26(35.1%)

11(20.4%)

4(25%)

0.247

 > 2

16(14.2%)

9(12.2%)

6(11.1%)

4(25%)

0.527

AO/OTA

 32A

87(77%)

60(81.1%)

45(83.3%)

14(87.5%)

0.651

 32B

26(23%)

14(18.9%)

9(16.7%)

2(12.5%)

 BMI

24.2 ± 10.3

24.3 ± 5.8

23.8 ± 4.6

27.1 ± 6.5

0.537

 BMI > 30

9(8%)

12(16.2%)

6(11.1%)

4(25%)

0.135

 Smoking

22(19.5%)

17(23%)

20(37%)

5(31.3%)

0.089

 Alcohol

20(17.7%)

15(20.3%)

15(27.8%)

4(25%)

0.491

 DM

5(4.4%)

2(2.7%)

1(1.9%)

4(25%)

0.001

Outcome

 Union time

5.5 ± 2.2

6.1 ± 2.4

5.6 ± 2

6.3 ± 1.9

0.233

 Nonunion

4(3.5%)

3(4.1%)

0(0.0%)

1(6.3%)

0.468

  1. F Female, M Male, A antegrade, R Retrograde, CN Canal to Nail, AO/OTA AO Foundation/Orthopaedic Trauma Association classification, BMI Body Mass Index, DM Diabetes Mellitus