Transepicondylar distance measured on MRI can predict the length of the graft required for different anterior cruciate ligament reconstruction (ACLR) techniques useful for revision surgery

Rosso, Federica; Rossi, Roberto; Faletti, Riccardo; Cantivalli, Antonino; Blonna, Davide; Bonasia, Davide Edoardo

doi:10.1186/s10195-022-00670-7

Journal of Orthopaedics and Traumatology

Official Journal of the Italian Society of Orthopaedics and Traumatology

Table 4 Correlation between 2D measurements (independent variables) and 3D measurements (dependent variables)

From: Transepicondylar distance measured on MRI can predict the length of the graft required for different anterior cruciate ligament reconstruction (ACLR) techniques useful for revision surgery

Correlation between 2 and 3D variables	Dependent variables (3D measurements)
Correlation between 2 and 3D variables	Intrarticular length of ACL graft		Outside-in femoral tunnel length		Outside-in anatomic ACL reconstruction		Saragaglia/Yamaguchi techniques		Anatomic anterolateral ligament reconstruction		lateral extrarticular tenodesis (anatomical femur)		lateral extrarticular tenodesis (non-anatomical femur)		Over the top femoral position ACL reconstruction		Marcacci technique
Independent variables (2D measurements)	Coeff	p-value	Coeff	p-value	Coeff	p-value	Coeff	p-value	Coeff	p-value	Coeff	p-value	Coeff	p-value	Coeff	p-value	Coeff	p-value
Transepicondylar distance (TD)	0.85	< 0.0001	0.91	< 0.0001	0.94	< 0.0001	0.92	< 0.0001	0.73	< 0.0001	0.74	< 0.0001	0.81	< 0.0001	0.91	< 0.0001	0.9	< 0.0001
Medial Femoral condyle AP dimension	0.75	< 0.0001	0.8	< 0.0001	0.85	< 0.0001	0.85	< 0.0001	0.75	< 0.0001	0.75	< 0.0001	0.8	< 0.0001	0.75	< 0.0001	0.86	< 0.0001
Lateral Femoral condyle AP dimension	0.8	< 0.0001	0.76	< 0.0001	0.84	< 0.0001	0.85	< 0.0001	0.74	< 0.0001	0.73	< 0.0001	0.86	< 0.0001	0.82	< 0.0001	0.87	< 0.0001
Proximal tibia ML dimension	0.82	< 0.0001	0.85	< 0.0001	0.89	< 0.0001	0.9	< 0.0001	0.76	< 0.0001	0.76	< 0.0001	0.83	< 0.0001	0.88	< 0.0001	0.89	< 0.0001
Medial tibial plateau AP dimension	0.8	< 0.0001	0.81	< 0.0001	0.88	< 0.0001	0.85	< 0.0001	0.7	< 0.0001	0.71	< 0.0001	0.8	< 0.0001	0.88	< 0.0001	0.9	< 0.0001
Lateral tibial plateau AP dimension	0.8	< 0.0001	0.85	< 0.0001	0.89	< 0.0001	0.89	< 0.0001	0.75	< 0.0001	0.75	< 0.0001	0.83	< 0.0001	0.9	< 0.0001	0.89	< 0.0001
Tibial PCL insertion-trochlearcartilage distance	0.8	< 0.0001	0.8	< 0.0001	0.84	< 0.0001	0.85	< 0.0001	0.76	< 0.0001	0.73	< 0.0001	0.8	< 0.0001	0.86	< 0.0001	0.87	< 0.0001
Patellar tendon length	0.39	0.0052	0.52	0.0001	0.52	0.0001	0.5	0.0002	0.47	0.0006	0.46	< 0.0001	0.55	0.0001	0.51	0.0001	0.51	0.0001
Independent variables (Morphometric data)
Patient's height	0.68	< 0.0001	0.73	< 0.0001	0.78	< 0.0001	0.76	< 0.0001	0.68	< 0.0001	0.66	< 0.0001	0.78	< 0.0001	0.76	< 0.0001	0.77	< 0.0001

Pearson’s or Spearman’s correlation test were used according to the normality of the data distribution. In addition, the patients’ height was tested as well as an independent variable for possible correlation with 3D measurements
The coefficients and p-values are bold when the Spearman’s test was used
Coeff coefficients, AP anteroposterior, ML medi iolateral, PCL posterior cruciate ligament, ACL anterior cruciate ligament

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