Table 1. Detailed description of outcomes and predictor variables.
| Outcome measures | Subgroups |
|---|---|
| Objective outcomes | Total IKDC (C-D) Positive Pivot shift (B-C-D) Positive Lachman (B-C-D) Anterior crackling (B-C-D) Leg hop test (B-C-D) |
| Subjective outcomes | Lysholm > 85 points IKDC > 78 points Knee function > 85% |
| Sport | Return-to-sport (yes) SPORTS score (9–10) ACL-RSI > 60% |
| Failure | Revision ACL surgery (yes/no) |
| Predictor variables | Variable |
| Patient-related | Age Gender Ipsilateral previous knee surgery (yes/no) Contralateral ACL reconstruction (yes/no) |
| Surgery-related | Timing of surgery (acute: within 3 mo) Graft choice (BPTB vs. QH) Associated procedures (yes/no) |
| Rehabilitation-related | Beginning of rehabilitation (within or after 1 mo postoperatively) Duration of rehabilitation (more or less than 3 mo) Number of rehabilitation sessions On-field rehabilitation phase (yes/no) |
| Sport-related | Preoperative activity level |
| Outcome-related | Lysholm score > 85 points Total objective IKDC graded as “A or B” KT-1000 graded as “A or B” ACL-RSI > 60% |
Abbreviations: ACL-RSI, anterior cruciate ligament–return to sport after injury; BPTB, bone–patellar tendon–bone; IKDC, International Knee Documentation Committee; QH, quadrupled hamstrings; SPORTS, Subjective Patient Outcome for Return to Sports.