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Table 1 Baseline characteristics and comparison of the disability and control groups

From: Association of global sagittal spinal deformity with functional disability two years after total hip arthroplasty

 

Disability group

n = 30

Control group

n = 178

P value

Age (years)

74.9 ± 7.1

74.2 ± 7.3

0.745

Male (n, %)

4, 13.3

21, 11.8

0.811

Body height (cm)

153.1 ± 3.1

156.7 ± 4.3

0.020*

Body height < 148 cm (n, %)

6, 20.0

12, 6.7

0.042*

Body mass index (kg/m2)

25.3 ± 3.1

24.5 ± 3.1

0.723

Pre-operative diagnosis (n, %)

  

0.174

 Primary osteoarthritisa

3, 10.0

15, 8.4

 

 Secondary osteoarthritisa

22, 73.3

143, 80.3

 

 Osteonecrosis of the femoral head

2, 6.7

16, 9.0

 

 Others

3, 10.0

4, 2.2

 

Kellgren-Lawrence classification (n)

 Garde II: III: IV

0: 5: 20

0: 32: 126

0.977

Prevalent vertebral fractures (n, %)

  

0.466

 0

22, 73.3

144, 80.9

 

 1

6, 20.0

29, 16.3

 

 2+

2, 6.7

5, 2.8

 

Surgeons’ experience (n, %)

  

0.310

  < 8 years

2, 6.7

6, 3.4

 

 8–15 years

16, 53.3

76, 42.7

 

  > 15 years

12, 40.0

96, 53.9

 

Modified Harris Hip Scoreb, c

49.2 ± 12.8

53.4 ± 13.1

0.544

66.2 ± 7.8

91.7 ± 6.9

0.038*

Visual analogue scale-pain (mm)c

87.6 ± 21.8

71.8 ± 22.9

0.352

22.7 ± 13.2

16.9 ± 13.1

0.611

Visual analogue scale-satisfaction (mm)c

84.1 ± 14.3

75.1 ± 13.7

0.747

55.9 ± 12.3

14.9 ± 13.1

0.033*

HOOS-JRc

48.1 ± 13.8

45.9 ± 13.6

0.917

52.8 ± 16.1

87.5 ± 14.3

0.010*

EuroQol 5-Dimensionc

0.43 ± 0.17

0.43 ± 0.11

0.894

0.63 ± 0.12

0.70 ± 0.12

0.125

Trendelenburg sign (n, %)c

8, 26.7

43, 24.2

0.768

6, 20.0

7, 3.9

< 0.001*

C7 sagittal vertical axis (mm)c

25.1 ± 31.9

22.8 ± 33.5

0.763

27.0 ± 31.7

25.2 ± 32.9

0.648

Lumbar lordosis (°)c

34.1 ± 15.5

52.9 ± 16.7

0.016*

37.1 ± 14.8

50.5 ± 17.5

0.018*

Pelvic incidence (°)c

45.8 ± 13.2

47.2 ± 13.7

0.691

45.6 ± 13.5

47.2 ± 13.4

0.863

Pelvic incidence minus lumbar lordosis (°)c

11.7 ± 11.7

−5.7 ± 10.7

0.027*

8.5 ± 12.1

−3.3 ± 10.1

0.265

Pelvic tilt (°)c

13.7 ± 8.1

13.2 ± 10.8

0.724

14.2 ± 9.3

14.8 ± 11.3

0.717

T1 pelvic angle (°)c

14.7 ± 13.2

8.5 ± 8.1

0.041*

15.5 ± 13.8

9.9 ± 9.4

0.032*

T1 pelvic angle divided by pelvic incidencec

0.32 ± 0.11

0.18 ± 0.09

0.018*

0.34 ± 0.14

0.21 ± 0.08

0.023*

Complication at the reattached fragmentd

 Total, (n, %)

7, 23.3

13, 7.3

0.006*

 Type I: II: III (n)

2: 3: 2

8: 4: 1

0.286

  1. Data are expressed as mean ± standard deviation or the number of hip involvement (%) as appropriate for the data type
  2. *P < .05; represents significant between-group differences
  3. HOOS-JR the Hip Disability and Osteoarthritis Outcome Score Joint Replacement
  4. aPrimary hip osteoarthritis was unassociated with developmental dysplasia of the hip. The dysplasia was defined as a center edge angle of ≤25°, acetabular roof obliquity of ≥10°, or acetabular head index of ≤75% [20]
  5. bComposite measure covering pain and function, scored on a scale ranging from 0 to 100, with a higher value representing improved function and decreased pain
  6. cBetween-group comparisons of outcomes pre-operatively (upper row) and at the two-year follow-up (lower row)
  7. dTip and base fractures of the greater trochanter for Types I and II, respectively; and a migration of the osteotomized fragment for Type III [22]
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BMC Musculoskeletal Disorders

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