Table 2 Results of the univariate analysis of factors for dislocation after total hip arthroplasty

Age at THA*

(years)

61.7 ± 14.2

(40–79)

63.4 ± 11

(33–85)

0.75

0.10

Sex

(hips/cases)

Male

2/2

66/56

1.00

0.02

Female

7/7

208/191

BMI

(kg/m²)*

25 ± 5.5

(17.2–36.6)

24.5 ± 4.4

(15.8–39.6)

0.76

0.10

Diagnosis

(hips)

OA

4

212

0.037^a

5.2

Others

5

62

ONFH

2

49

FNF

1

7

RA

1

2

RDC

1

4

Mean CA* (degree)

Widmer

30.4 ± 8.5

(15.1–41.2)

37.1 ± 5.9

(19.8–62.1)

0.017^a

5.74

Yoshimine

81.3 ± 12

(60–95)

90.6 ± 7.4

(66.7–118.7)

0.014^a

5.98

Widmer CA (hips)

Good

2

156

0.047^a

4.26

Poor

7

118

Yoshimine CA (hips)

Good

4

229

0.01^a

9.17

Poor

5

45

Total offset (hips)

Increase ( +)

1

168

0.004^a

9.13

Decrease (-)

8

106

Acetabular offset (hips)

Increase ( +)

2

62

1.00

0.001

Decrease (-)

7

212

Femoral offset (hips)

Increase ( +)

6

217

0.41

0.82

Decrease (-)

3

57

Total offset D* (mm)

-3.5 ± 8.0

(-15.9–12.7)

1.1 ± 8.9

(-31.7–43.4)

0.06

3.55

Acetabular offset D* (mm)

-6.1 ± 8.0

(-22.3–3.2)

-5.1 ± 6.6

(-30.8–26)

0.95

0.004

Femoral offset D* (mm)

1.6 ± 5.4

(-4.7–12.6)

5.3 ± 7.0

(-14.1–29.9)

0.08

3.04

Femoral head size

 ≥ 32 mm

6

220

0.39

1.01

 < 32 mm

3

54