Table 1 Preoperative demographic data^a

Age at surgery, year

22.4 ± 8.8

21.1 ± 6.1

n.s.

Male sex, n

13

11

n.s.

Injury side, right, n

19

9

n.s.

Body mass index, kg/m²

23.7 ± 4.1

22.5 ± 3.7

n.s.

Number of dislocations, n

1.1 ± 1.1

1.4 ± 1.1

n.s.

Interval^b, months

7.0 ± 2.1

7.5 ± 2.0

n.s.

Follow-up period, months

32.8 ± 15.2

34.6 ± 13.0

n.s.

TT–TG distance, mm

10.6 ± 3.0

9.5 ± 3.2

n.s.

Patella dysplasia, n

n.s.

 None

5

3

 Dejour type A

19

14

 Type B

8

8

 Type C or D

0

0