Table 3 Patient characteristics in all four subgroups (A no patellofemoral defects, B patella surface defects, C trochlear defects, D kissing lesions in the patellofemoral joint). Pre- and six weeks postoperative radiological values: varus deformity and valgus correction, as well as preop CDP, BPI and ISI

n

39

20

9

22

Age at surgery (years, mean, SD, range)

42.72 ± 10.76* (18.90 – 57.20)

49.34 ± 8.05 (33.20 – 62.20)

47.11 ± 6.68 (38.30 – 56.90)

50.93 ± 8.56 (27.60 – 66.90)

Follow-up (years, mean, SD, range)

119.87 ± 29.32 (73 – 171)

130.5 ± 27.15 (86 – 171)

123 ± 30.94 (77 – 166)

113.55 ± 24.38 (78 –167)

BMI at surgery (kg/m²)

26.34 ± 4.64 (12.30 – 37.90)

28.78 ± 4.15 (20.80 – 36.80)

27.76 ± 3.45 (23.30 – 35.20)

29.32 ± 5.01 (20.70 – 41.30)

Varus preOP (°)

6.12 ± 2.86 (2.1 – 13.30)

7.33 ± 2.80 (4.2 – 14.10)

6.76 ± 1.72 (4.50 – 9.30)

5.82 ± 2.83 (2 – 13.90)

Valgus postOP (°)

3.16 ± 1.77 (0.3 – 10.60)

2.20 ± 1.59 (0.1 – 5.6)

2.76 ± 1.83 (0.9 – 5.8)

2.31 ± 1.67 (0.1 – 7.2)

CDI preOP

1.02 ± 0.18 (0.73 – 1.5)

1.06—± 0.13 (0.8 – 1.3)

1.17 ± 0.18 (0.95 – 1.4)

0.99 ± 0.12 (0.66 – 1.2)

BPI preOP

0.91 ± 0.22 (0.31- 1.3)

0.95 ± 1.11 (0.78 – 1.1)

1.08 ± 0.95 (0.94 – 1.2)*

0.91 ± 0.13 (0.75 – 1.3)

ISI preOP

0.92 ± 0.15 (0.71 – 1.40)

0.87 ± 0.14 (0.7 – 1.1)

0.95 ± 0.15 (0.76 – 1.2)

0.95 ± 0.15 (0.71 – 1.2)