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Table 2 Anatomic parameters of the proximal tibia among three age groups

From: Evaluation of the theoretical optimal angle of the tibial tunnel in transtibial anatomic posterior cruciate ligament reconstruction by computed tomography

Age group (years) Mean Standard ± Deviation
L1 (mm) TOA (°) L2 (mm) L3 (mm)
Total The Young
18–30 (n = 153)
39.2 ± 6.5 34.0 ± 6.7 45.6 ± 9.6 25.4 ± 10.6
The Middle-aged
31–45 (n = 104)
41.6 ± 7.2* 37.3 ± 7.3* 48.9 ± 10.6* 28.7 ± 9.9*
The Elderly
46–60 (n = 151)
39.9 ± 8.6 35.5 ± 9.1 47.2 ± 12.6 26.9 ± 12.9
  1. Compared to the young, *P < 0.05. L1 the thickness of cancellous bone, TOA the theoretical optimal angle, L2 the distance from anterior tunnel aperture to anterior end of tibial plateau, L3 the distance from anterior tunnel aperture to the tibial tuberosity (lowest edge of patellar ligament attachment)