Table 1 Characteristics of all subjects

Patient (n)

100

46

54

Acetabulum (n)

200

92

108

 Mean (SD) (year)^a

51.0 (16.0)

50.6 (18.6)

51.4 (13.5)

0.884

 Median (year)

52.0

57.5

51.0

 Range (year)

21–79

21–79

26‐77

Focal concavity of posterior superior acetabulum (n)

13/200

7/92

6/108

0.578

 Mean (SD) (°)^a

25.1 (8.8)

27.9 (6.7)

22.7 (9.7)

<0.001

 Range (°)

2.4–45.0

10.5–45.0

2.4–44.3

 Dysplasia (<25°) (n)^b

91/200

28/92

63/108

<0.001

 Mean (SD) (°)^a

9.5 (6.9)

7.2 (5.7)

11.5 (7.2)

<0.001

 Range (°)

−6.7–29.6

−6.7–23.2

−6.0–29.6

 Dysplasia (>10°) (n)^b

89/200

28/92

61/108

<0.001

 Mean (SD) (°)^a

27.9 (10.3)

31.3 (7.9)

24.9 (11.1)

<0.001

 Range (°)

−10.3–50.5

11.6–49.6

−10.3–50.5

 Dysplasia (<25°) (n)^b

68/200

19/92

49/108

<0.001

 Mean (SD) (°)^a

12.9 (9.7)

8.6 (10.0)

16.5 (7.8)

<0.001

 Range (°)

−10.5–38.5

−10.5–38.5

−1.0–36.5

 Retroversion (<0°) (n)^b

24/200

22/92

2/108

<0.001