Table 5 Characteristics of subjects at 50 years or younger

Patient (n)

49

22

27

Acetabulum (n)

98

44

54

 Mean (SD) (year)^a

36.8 (8.7)

32.9 (9.0)

40.0 (6.8)

<0.001

 Median (year)

38.0

31.0

41.0

 Range (year)

21–50

21–50

26–50

superior acetabulum (n)

7/98

3/44

4/54

1.000

 Mean (SD) (°)^a

23.6 (9.3)

27.6 (6.9)

20.3 (9.7)

<0.001

 Range (°)

2.4–45.0

14.0–45.0

2.4–41.5

 Dysplasia (<25°) (n)^b

52/98

15/44

37/54

0.001

 Mean (SD) (°)^a

9.5 (7.6)

6.8 (6.4)

11.6 (7.8)

0.003

 Range (°)

−6.7–27.5

−6.7–23.2

−6.0–27.5

 Dysplasia (>10°) (n)^b

43/98

11/44

32/54

<0.001

 Mean (SD) (°)^a

27.8 (11.6)

31.9 (8.8)

24.5 (12.4)

0.002

 Range (°)

−10.3–50.5

11.6–49.6

−10.3–50.5

 Dysplasia (<25°) (n)^b

38/98

10/44

28/54

0.004

 Mean (SD) (°)^a

11.5 (9.8)

6.6 (10.4)

15.4 (7.0)

<0.001

 Range (°)

−10.0–38.5

−10.0–38.5

−1.0–29.0

 Retroversion (<0°) (n)^b

16/98

15/44

1/54

<0.001