Table 1.
Study Design, Graft Type, Time Since Surgery, Strength Measurement, and Limb Information for Included Studies (in Reverse Chronological Order)a
| Lead Author, Year | Design | Graft Type | Time Since Surgery, mo | Strength Measurement Type | Difference in Strength, % |
|---|---|---|---|---|---|
| Almeida, 20181 | Case-control | Hamstring tendon | 6 | Isokinetic at 60 (used) and 240 deg/s | 18 (ACLR < C) |
| Boo, 20186 | Cross-sectional | Not reported | 7.3 | Isokinetic at 60 deg/s | 24 (ACLR < C) |
| Garrison, 201810 | Cross-sectional | Not reported | 3 | Isokinetic at 60 deg/s | 45 (ACLR < C) |
| Johnson, 201819 | Cross-sectional | Patellar tendon | 7.5 ± 1.4 | Isometric at 90° (used); isokinetic at 60 deg/s | 25 (ACLR < C) |
| O’Malley, 201840 | Cross-sectional | Patellar tendon | 6.6 ± 1 | Isokinetic at 60 deg/s | 23 (ACLR < C) |
| Pamukoff, 201842 | Cross-sectional | Combination of graft types (patellar tendon, hamstring tendon, or allograft) | 48.0 ± 25.0 | Isometric at 45° (used); isokinetic at 60, 180, and 240 deg/s | 10 (ACLR < C) |
| Pelegrinelli, 201845 | Case-control | Hamstring tendon | 5 (4.5-6)b | Isokinetic at 60, 120, and 300 deg/s | 18 (ACLR < C) |
| Mirkov, 201735 | Cross-sectional | Patellar tendon | 4 ± 0.3 | Isometric at 45° | 23 (ACLR < C) |
| Kuenze, 201725 | Clinical trial | Combination of graft types (patellar tendon or hamstring tendon) | 27.9 ± 16 | Isometric at 90° | 20 (ACLR < C) |
| Goetschius, 201611 | Cross-sectional | Not reported | 44.1 ± 29.9 | Isometric at 90° | 13 (ACLR < C) |
| Zwolski, 201659 | Cross-sectional | Not reported | 9.2 ± 2.2 | Isometric at 60° | 17 (ACLR < C) |
| Lepley, 201530 | Case-control | Combination of graft types (patellar tendon or hamstring tendon) | Presurgery and 6.5 post-ACLR (used) | Isometric at 90° | 28 (ACLR < C) |
| Kuenze, 201526 | Cross-sectional | Combination of graft types (patellar tendon or hamstring tendon) | 31.5 ± 23.5 | Isometric at 90° | 10 (ACLR < C) |
| Chung, 20157 | Cohort | Hamstring tendon | 3 (used), 6, 12, and 24 (used) | Isokinetic at 60 (used) and 180 deg/s | 39 (pre-RTS: ACLR < C); 17 (post-RTS: ACLR < C) |
| Hsieh, 201517 | Cross-sectional | Combination of graft types (patellar tendon, hamstring tendon, or allograft) | 2.8 | Isokinetic at 60 deg/s | 36 (ACLR < C) |
| Lepley, 201429 | Cross-sectional | Combination of graft types (patellar tendon, hamstring tendon, or allograft) | 48.2 ± 35.5 | Isometric at 90° | 15 (ACLR < C) |
| Mohammadi, 201336
|
Randomized controlled trial | Patellar tendon and hamstring tendon (separate cohorts) | Patellar tendon, 8.1 ± 1.4; hamstring tendon, 8.2 ± 1.8 |
Isokinetic at 60 (used) and 180 deg/s | 15 (ACLR < C) |
| Xergia, 201358 | Cross-sectional | Patellar tendon | 7 ± 0.9 | Isokinetic at 120 (used), 180, and 300 deg/s | 24 (ACLR < C) |
| Thomas, 201350 | Cross-sectional | Patellar tendon | Presurgery and 7 post-ACLR (used) | Isokinetic at 60 deg/s | 17 (ACLR < C) |
| Rudroff, 200348 | Case-control | Patellar tendon | 24 | Isometric at 90° | 12 (ACLR > C) |
| Mattacola, 200234 | Cross-sectional | Patellar tendon | 18 ± 10 | Isokinetic at 120 (used) and 240 deg/s | 15 (ACLR < C) |
aACLR, anterior cruciate ligament reconstruction; C, control; RTS, return to sport. Used indicates that data from that particular test were included in the meta-analyses.
bReported as median.