Table 3 Logistic regression of risk factors of patellar maltracking

Age

− 0.030

0.558

0.970

Sex

2.341

0.116

10.394

Height

0.089

0.743

1.093

Weight

−0.199

0.568

0.820

BMI

0.468

0.557

1.596

Preoperative flexion contracture

−0.004

0.919

0.996

Preoperative further flexion

0.011

0.815

1.011

Preoperative mechanical axis

0.049

0.355

1.050

Preoperative patellar tilt

0.009

0.936

1.009

Preoperative patellar displacement

0.253

0.075

1.288

Preoperative Insall-Salvati ratio

0.385

0.868

1.470

Preoperative Blackburne-Peel ratio

−4.321

0.059

0.013

Preoperative patellar thickness

0.724

0.053

2.062

MCL release

3.025

0.005

20.592

PCL release

−0.134

0.858

0.874

Femoral valgus cut angle

−0.710

0.074

0.492

Distal femoral cut rotation

−0.052

0.799

0.950