Table 2. The anteroposterior and rotational stability of involved knees from DB and SBL Stabilityreconstruction groups. Group 3 months Statistical test 6 months Statistical test 12 months Statistical test Anterior drawer test Positive-Rate DB 20% χ²= 0.254 P= 0.613 20% χ²= 0.254 P= 0.613 20% χ²= 0.254 P= 0.613 SBL 25% 25% 25% Lachman test Positive-Rate DB 20% χ²= 0.284 P= 0.593 20% χ²= 0.284 P= 0.593 20% χ²= 0.284 P= 0.593 SBL 25% 25% 25% Stress radiography D-Value (I/N) DB 4.4 ± 0.3 mm Duncan n.s. 4.8 ± 0.4 mm Duncan n.s. 5.1 ± 0.3 mm Duncan n.s. SBL 4.6 ± 0. 3 mm 5.0 ± 0.3 mm 5.3 ± 0.4 mm KT-2000 D-Value (I/N) DB 3.8 ± 0.2 mm Duncan n.s. 3.9 ± 0.2 mm Duncan n.s. 3.2 ± 0.2 mm Duncan n.s. SBL 4.0 ± 0.2 mm 3.9 ± 0.2 mm 3.4 ± 0.2 mm Pivot-shift test Positive-Rate DB 20% χ²= 0 P= 1 20% χ²= 0 P= 1 20% χ²= 0 P= 1 SBL 20% 20% 20% Rotameter D-Value (I/N) DB 1.1 ± 0.2 mm Duncan n.s. 1.1 ± 0.2 mm Duncan n.s. 1.2 ± 0.2 mm Duncan n.s. SBL 1.0 ± 0.2 mm 1.0 ± 0.2 mm 1.1 ± 0.2 mm DB: anatomic double-bundle ACL reconstruction group, SBL: anatomic single-bundle ACL reconstruction + ALL reconstruction group, D-Value: Difference-Value, I/N: Involved vs Normal, n.s.: no significance