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Table 1 Patient characteristics

From: Influence of the knot position on the union of the greater trochanter after bipolar hip arthroplasty via the modified Dall approach: a prospective non-randomized study

Parameter

Anterior group

Posterior group

p value

Number of hips

47

48

 

Age at operation; years old (range)

82.4 ± 7.0 (69–95)

82.6 ± 7.9 (62–98)

0.89

Sex, male:female

14:33

18:30

0.43

Body mass index; kg/m2 (range)

20.1 ± 3.7 (13.4–27.7)

18.9 ± 3.4 (12.2–28.3)

0.10

Size of the greater trochanteric fragment

 length; mm (range)

33.2 ± 5.7 (23–45)

33.3 ± 5.3 (22–45)

0.93

 width; mm (range)

21.7 ± 4.1 (14–34)

21.4 ± 4.0 (14–30)

0.76

 thickness; mm (range)

8.9 ± 1.8 (5–14)

8.8 ± 1.9 (5–12)

0.81

 estimated volume; mm3 (range)

6810 ± 3547 (1820–17,640)

6706 ± 3213 (2030–13,766)

0.89

Type of the stem

  

0.38

 Exeter

4 (8.5%)

6 (12.5%)

 

 SC

43 (91.5%)

42 (87.5%)

 

Surgeon

  

0.31

 A

26 (55.3%)

30 (62.5%)

 

 B

16 (34.0%)

10 (20.8%)

 

 Others

5 (10.6%)

8 (16.7%)

 

Type of the greater trochanter

  

0.045*

 Type A

34 (72.3%)

44 (91.7%)

 

 Type C

5 (10.6%)

1 (2.1%)

 

 Type F

8 (17.0%)

3 (6.3%)

 
  1. mean ± standard deviation
  2. *means less than 5%