Table 2 Preoperative, Immediate Postoperative, and Two-year Follow-Up Radiologic Parameters^a

Lateral patellofemoral angle (^o)

30 ^o

−7.6 ± 10.6

7.6 ± 3.1

8.8 ± 4.1

< 0.001

0.260

45 ^o

−6.2 ± 6.5

9.2 ± 0.4

10.4 ± 4.6

0.001

0.285

60 ^o

−0.9 ± 5.6

11.0 ± 2.5

13.0 ± 3.2

0.006

0.140

90 ^o

6.6 ± 3.4

12.2 ± 2.4

15.6 ± 3.2

0.033

0.093

Congruence angle (^o)

30 ^o

30.1 ± 13.9

3.6 ± 1.5

2.9 ± 1.3

< 0.001

0.221

45 ^o

26.1 ± 15.2

2.9 ± 1.0

2.7 ± 1.0

0.001

0.233

60 ^o

18.4 ± 11.0

2.8 ± 1.6

2.7 ± 1.4

0.014

0.008

90 ^o

11.5 ± 7.4

1.7 ± 1.1

1.7 ± 1.0

0.010

0.483

Sulcus angle (^o)

30 ^o

146.9 ± 7.4

145.3 ± 6.4

145.4 ± 5.5

0.491

0.442

45 ^o

146.6 ± 2.4

145.5 ± 1.7

146.0 ± 4.8

0.549

0.255

60 ^o

146.1 ± 4.5

145.2 ± 5.9

146.5 ± 5.4

0.870

0.302

90 ^o

146.4 ± 3.4

145.8 ± 5.5

144.8 ± 5.0

0.634

0.322

IS Ratio

1.2 ± 0.1

1.1 ± 0.1

< 0.001