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Table 1 Baseline variables between non-perfect reduction and perfect reduction before PSM and after PSM

From: Essential role of reliable reduction quality in internal fixation of femoral neck fractures in the non-elderly patients—a propensity score matching analysis

  

Before PSM

Χ2/Z

P

After PSM

Χ2/Z

P

  

IR

PR

IR

PR

IBM

 < 25

40 (21.05)

91 (47.89)

3.87

0.049

29 (37.18)

29 (37.18)

0

 > 0.05

 >  = 25

10 (5.26)

49 (25.79)

10 (12.82)

10 (12.82)

Sex

Male

32 (16.84)

64 (33.68)

4.93

0.026

21 (26.92)

21 (26.92)

0

 > 0.05

Female

18 (9.47)

76 (40)

18 (23.09)

18 (23.08)

Smoking

No

45 (23.68)

136 (71.58)

4.17

0.041

39 (50)

37 (47.44)

2.83

0.093

Yes

5 (2.63)

4 (2.11)

0 (0)

2 (2.56)

Injured side

Left

30 (15.79)

85 (44.74)

.008

0.93

23 (29.49)

20 (25.64)

0.47

0.49

Right

20 (10.53)

55 (28.95)

16 (20.51)

19 (24.36)

Diabetes

No

41 (21.58)

120 (63.16)

.39

0.53

32 (41.03)

31 (39.74)

0.083

0.77

Yes

9 (4.74)

20 (10.53)

7 (8.97)

8 (10.26)

Occupation

Non-heavy manual workers

37 (19.47)

109 (57.37)

.31

0.58

32 (41.03)

30 (38.46)

0.32

0.58

Heavy manual workers

13 (6.84)

31 (16.32)

7 (8.97)

9 (11.54)

Interval between injury and surgery

 <  = 72 h

17 (8.95)

56 (29.47)

.56

0.45

11 (14.10)

9 (11.54)

0.27

0.60

 > 72 h

33 (17.37)

84 (44.21)

28 (35.90)

30 (38.46)

Reduction type

Closed reduction

45 (23.68)

129 (67.89)

0.22

0.64

34 (43.59)

35 (44.87)

.13

0.72

Open reduction

5 (2.63)

11 (5.79)

5 (6.41)

4 (5.13)

Fracture site

Subcapital

27 (14.21)

49 (25.79)

8.81

0.012

20 (25.64)

15 (19.23)

8.67

0.013

Transcervical

16 (8.42)

79 (41.58)

12 (15.38)

23 (29.49)

Substrate

7 (3.689)

12 (6.32)

7 (8.97)

1 (1.28)

Garden Classification

II

0 (0)

31 (16.33)

26.67

0.001

0 (0)

1 (1.28)

1.12

0.57

III

9 (4.74)

51 (26.85)

9 (11.54)

10 (12.82)

IV

41 (21.58)

58 (30.53)

30 (38.46)

28 (35.90)

Pauwels Classification

I

5 (2.63)

37 (19.47)

8.56

0.014

5 (6.41)

7 (8.97)

.46

0.80

II

23 (12.11)

67 (35.26)

17 (21.79)

17 (21.79)

III

22 (11.58)

36 (18.95)

17 (21.79)

15 (19.23)

Age (years)

55 (42.75,59.25)

50.5 (38.25,60)

-1.05

0.29

53 (40,59)

54 (38,60)

-0.15

0.88