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Table 3 Comparison of radiographic measurements between patients in the PG and CG

From: Association between cup orientation and low back pain after total hip arthroplasty in patients with osteonecrosis of the femoral head

Variable

PG (n=53)

CG (n=106)

Preoperative

Postoperative

Variation

Preoperative

Postoperative

Variation

Center-Edge (CE) angle (°)

Left

36(33,38)

  

36(33,37)

  

Right

36(33,40)

  

38(35,38)

  

Sharp angle (°)

Left

36(35,37)

  

36(35,38)

  

Right

36(35,38)

  

36(35,39)

  

Acetabular coverage (%)

Left

84(81,86)

  

84(78,85)

  

Right

83(80,86)

  

82(78,85)

  

Tönnis angle (°)

Left

7(7,8)

  

8(7,8)

  

Right

7(7,8)

  

8(7,8)

  

Femoral neck-shaft angle (°)

Left

125(121,127)

  

126(123,132)

  

Right

126(122,128)

  

126(123,130)

  

Inclination (°)

Left

40(38,42)

40(38,42)

-1(-1,0)

41(39,43)

42(38,43)*

0(-1,2)

Right

40(39,42)

40(38,42)

-1(-2,0)

41(40,43)

42(39,43)*

1(-1,2)

Anteversion (°)

Left

15(14,16)

14(14,16)

-1(-1,1)

15(14,16)

15(14,16)*

1(-1,1)

Right

15(14,16)

15(14,15)

-1(-1,1)

15(14,16)

15(14,16)*

0(-1,1)

Ante-Inclination (AI)

(standing) (°)

Left

34(31,35)

33(30,36)

-1(-2,1)

34(33,36)

35(33,36)*

0(-1,1)*

Right

33(32,36)

33(30,35)

-1(-2,1)

34(33,36)

35(33,36)*

0(-1,1)*

Ante-Inclination (AI)

(sitting) (°)

Left

50(48,54)

51(48,54)

0(-1,1)

52(50,55)

52(49,54)

1(-1,1)

Right

52(50,54)

50(48,54)

-1(-2,1)

52(50,54)

52(50,55)

0(-1,1)

Pelvic tilt (PT) (standing) (°)

13(9,17)

10(5,15)

-2(-4,0)

13(10,16)

12(9,17)

0(-3,3)*

Pelvic tilt (PT) (sitting) (°)

31(26,36)

29(26,34)

-1(-3,1)

32(27,38)

32(27,36)

0(-2,2)*

(standing PT - sitting PT) (°)

-19(-22,-16)

-20(-23,-17)

 

-19(-21,-17)

-19(-23,-16)

 

Pelvic incidence (PI) (°)

51(47,57)

  

51(47,58)

  

Sacral slope (SS) (standing) (°)

39(36,42)

41(38,44)

2(0,4)

39(36,41)

39(36,41)*

0(-3,3)*

Sacral slope (SS) (sitting) (°)

20(18,22)

22(17,24)

1(-1,3)

19(17,22)

19(17,21)*

0(-2,2)*

(standing SS - sitting SS) (°)

19(16,22)

20(17,23)

 

19(17,21)

19(16,23)

 

Lumbar lordosis (LL) (°)

59(51,66)

60(53,67)

2(-1,4)

57(51,63)

56(50,62)

-1(-2,2)*

Sagittal vertical axis (SVA) (mm)

5(-14,25)

6(-15,24)

0(-1,1)

8(-12,17)

8(-13,18)

0(-1,1)

  1. *Difference from low back pain group with statistical significance. (p < 0.05, Mann-Whitney U test)
  2. M(Q1, Q3) denotes the median (M) along with the first quartile (Q1) and the third quartile (Q3) of data