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Table 1 Basic demographics and comparison of radiographic parameters among three groups

From: Paradoxical spinopelvic motion: does global balance influence spinopelvic motion in total hip arthroplasty?

 

Normal Group

∆PT ≥ 10

(n = 84)

Stiffness group

0° ≤ ∆PT < 10°

(n = 35)

Paradoxical group

∆PT < 0°

(n = 5)

p-value

Sex

      

0.643

Female

50

(60%)

22

(63%)

4

(80%)

 

Male

34

(40%)

13

(37%)

1

(20%)

 

Age (year)

62

±15

69

±8

76

±15

0.076

Dislocation

0

(0%)

3

(9%)

2

(40%) a

< 0.001**

Spinal fusion

11

(13%)

14

(40%) a

3

(60%)

0.001**

Standing

SVA (cm)

3.8

±4.5

4.3

±2.9

−1.0

±5.1

0.066

TK

25

±13

26

±10

25

±9

0.847

LL

47

±15

40

±15

50

±11

0.070

SS

35

±10

30

±10

33

±10

0.068

PT

13

±11

19

±9 a

18

±8

< 0.001**

PI

48

±11

49

±10

51

±15

0.438

PI-LL

1

±15

9

±12 a

1

±11

0.007**

PFA

184

±10

191

±11 a

192

±9

0.004**

Cup anteversion

17

±9

19

±10

19

±4

0.734

Cup inclination

43

±7

45

±6

42

±4

0.476

Sitting

SVA (cm)

6.0

±2.8

5.5

±2.6

5.2

±3.5

0.721

TK

25

±14

27

±10

27

±11

0.189

LL

22

±14

33

±13 a

43

±6 a

< 0.001**

SS

15

±11

24

±10 a

35

±10 a

< 0.001**

PT

33

±12

25

±9 a

15

±8 a

< 0.001**

PFA

133

±16

125

±12 a

114

±9 a

0.003**

  1. *p < 0.05, **p < 0.01
  2. ap < 0.05 compared to normal group
  3. bp < 0.05 compared to stiffness group.
  4. SVA C7-sagittal vertical axis, TK thoracic kyphosis, LL lumbar lordosis, SS sacral slope, PT pelvic tilt, PI pelvic incidence, PI-LL PI-LL mismatch, PFA proximal femur angle