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Table 1 The demographics of two groups (ISS, injury severity score)

From: Modified pedicle screw-rod versus anterior subcutaneous internal pelvic fixation for unstable anterior pelvic ring fracture: a retrospective study and finite element analysis

Parameter

Modified group (n = 30)

Conventional group (n = 33)

P value

Age(years)

34.4 ± 17.5

36.2 ± 16.9

0.856a

Gender (male/female)

16/14

20/13

0.560b1

ISS

22(19, 29)

25(21, 32)

0.283a

 AO/OTA/modified tile type

  

0.136b2

 B1/B2/B3

4/15/6

7/17/3

 

 C1/C2/C3

2/3/0

4/2/0

0.846b1

Injury mechanism

   

 Traffic injury

13

15

 

 Falling injury

11

10

 

 Other

6

8

 

Time to surgery (days)

5(0, 14)

6(0,16)

0.782d

Operation time (min)

77.3 ± 11.2

52.6 ± 12.9

0.015a

Intraoperative blood loss (ml)

103.6 ± 10.2

87.7 ± 9.3

0.036a

Hospital stays (days)

11(7, 18)

14(8, 21)

0.028a

  1. aTwo-sample t test
  2. b1Pearson chi-squared test
  3. b2Cochran-Mantel-Haenszel test
  4. cFisher’s exact test
  5. dLog rank test