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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%