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Table 1 Cross-sectional area and enlargement rate in the tibial tunnels

From: Morphological changes in tibial tunnels after anatomic anterior cruciate ligament reconstruction with hamstring tendon graft

  Cross-sectional area (mm2) Enlargement rate (%) [(c-b)/b × 100] P (a vs. b) P (a vs. c) P (b vs. c)
Drill size intra-op. a 3 weeks post-op. b 1 year post-op. c
Anterior tunnels
 At the aperture 37.4 ± 2.4 37.7 ± 6.8 40.2 ± 11.4 6.1 ± 24.0 n.s. n.s. n.s.
 5 mm from the aperture 37.4 ± 2.4 37.6 ± 7.0 32.6 ± 7.2 - 12.5 ± 16.6 n.s. n.s. n.s.
 10 mm from the aperture 37.4 ± 2.4 37.9 ± 6.1 22.9 ± 8.7 - 38.5 ± 23.4 n.s. < 0.001 d < 0.001 d
Posterior tunnel
 At the aperture 20.2 ± 2.8 20.5 ± 4.1 28.9 ± 8.0 40.4 ± 23.9 n.s. 0.0013 d 0.0015 d
 5 mm from the aperture 20.2 ± 2.8 20.3 ± 4.6 24.2 ± 7.0 20.0 ± 25.7 n.s. n.s. n.s.
 10 mm from the aperture 20.2 ± 2.8 20.4 ± 3.9 18.2 ± 6.2 - 9.9 ± 28.9 n.s. n.s. n.s.
  1. Mean ± standard deviation
  2. Intra-op. intraoperatively, post-op. postoperatively
  3. d statistically significant difference with the Friedman test for one-way repeated measures analysis of variance (RM-ANOVA) by ranks and the Steel-Dwass test for post-hoc multiple comparison (P < 0.05)