Predictive factors for coronal and sagittal graft extrusion length after using tendon autograft for medial meniscus reconstruction

Table 1 Demographics

Variable	Description
Age (year)	36.10 ± 4.98
Gender, male/female	6/4
Body mass index	28.30 ± 4.80
Preoperative medial posterior tibial slope (°)	14.42 ± 2.39
Preoperative Kellgren-Lawrence grade, grade 0/grade 1/grade 2/grade 3	2/3/2/3
Preoperative hip-knee-ankle angle (°)	175.40 ± 3.86
Preoperative bilateral hip-knee-ankle angle difference (°)	2.13 ± 3.00
Preoperative absolute joint space width (mm)	3.09 ± 0.77
Preoperative relative joint space width	0.68 ± 0.12
Preoperative medial edge incline angle (°)	6.68 ± 9.68
Preoperative bilateral medial edge incline angle difference (°)	4.88 ± 7.87
Anterior tunnel edge distance (mm)	5.93 ± 3.42
Posterior tunnel edge distance (mm)	11.23 ± 6.15
1 wk after operation
Medial extrusion (mm)	1.00 ± 1.90
Anterior extrusion (mm)	-3.46 ± 2.29
Posterior extrusion (mm)	0.13 ± 2.90
Mean extrusion (mm)	-0.76 ± 2.05
Relative posterior graft position ratio	-0.08 ± 1.09
8 mo after operation
Medial extrusion (mm)	1.73 ± 2.38
Anterior extrusion (mm)	-2.90 ± 2.39
Posterior extrusion (mm)	1.38 ± 4.43
Mean extrusion (mm)	0.07 ± 2.72
Relative posterior graft position ratio	0.49 ± 0.76

Measurement data are given as the mean ± SD. Enumeration and ranked data are given as numbers of each portion.