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Table 1 Univariate analysis of clinical data

From: Standardized Tip-Apex Distance (STAD): a modified individualized measurement of cephalic fixator position based on its own femoral head diameter in geriatric intertrochanteric fractures with internal fixation

Factor

Overall

(n = 123)

without Cut-out group (n = 108)

with Cut-out group (n = 15)

p-value

OR (95% CI)

Age, years

80.4 ± 8.40

80.3 ± 8.43

81.1 ± 8.46

0.744

1.01 (0.95 to 1.08)

Gender (male/female), n

43/80

40/68

3/12

0.255*

2.35 (0.63 to 8.84)

Fracture site (left/right), n

72/51

64/44

8/7

0.781*

1.27 (0.43 to 3.77)

AO/OTA classification, n (%)

   

0.108*

NA

 31A1

62 (50.4)

58 (53.7)

4 (26.7)

  

 31A2

56 (45.5)

46 (42.6)

10 (66.7)

  

 31A3

5 (4.1)

4 (3.7)

1 (6.6)

  

Singh index, n

   

0.428*

1.56 (0.52 to 4.68)

 ≤ 3 / > 3

62/61

53/55

9/6

  

ASA score, n

   

0.956*

1.03 (0.34 to 3.10)

 ≤ 2 / >2

50/73

44/64

6/9

  

Anesthesia (spinal/general), n

95/28

82/26

13/2

0.517*

2.06 (0.44 to 9.74)

Fixation type (blade/screw), n

41/82

35/73

6/9

  

Reduction quality, n (%)

   

0.176*

NA

 Good

54 (43.9)

50 (46.3)

4 (26.7)

  

 Acceptable

47 (38.2)

38 (35.2)

9 (60.0)

  

 Poor

22 (17.9)

20 (18.5)

2 (13.3)

  

Cleveland zone, n

   

0.002 *

6.39 (1.99 to 20.57)

 Acceptable&/the others

105/18

97/11

8/7

  

Parker’s ratio (AP), %

48.57 ± 8.19

48.01 ± 7.48

52.64 ± 11.67

0.043

1.07 (1.00 to 1.15)

Parker’s ratio (Lat), %

49.82 ± 8.19

49.59 ± 7.56

51.46 ± 11.99

0.410

1.02 (0.96 to 1.10)

TAD, mm

19.16 ± 4.97

18.55 ± 4.73

23.57 ± 4.53

< 0.001

1.23 (1.09 to 1.40)

TAD, n

     

 > 25 mm / < 25 mm

20/103

14/94

6/9

0.022 *

4.48 (1.38 to 14.51)

STAD, D

2.35 ± 0.64

2.24 ± 0.56

3.14 ± 061

< 0.001

11.98 (3.78 to 37.94)

STAD, n

§

§

§

< 0.001 *

NA

  1. Student’s t-test
  2. * Chi-square test
  3. NA, not applicable
  4. § The distribution of values is indicated in Fig. 3
  5. & Acceptable means Cleveland zone 5 or 8
  6. OR, odds ratio; CI, confidence interval; AO/OTA, AO Foundation and Orthopaedic Trauma Association; ASA, American Society of Anesthesiologists; AP, anteroposterior view; Lat, lateral view; TAD, tip-apex distance; STAD, standardized tip-apex distance; iFHD, its own femoral head diameter; iFHD = 6D in this study