Table. Characteristics of the Included Studies.
| Study | Intervention group [dropouts at last follow-up] | Control group [dropouts at last follow-up] | Treatment frequency and duration | Follow-up | Outcome measures | Difference of means (favors HBP or IOP) |
|---|---|---|---|---|---|---|
| Akkaya et al,36 2012 | EBT (group A) and NEMS + HBP (group B) combined for meta-analysis (n = 30) [none] | HBP (n = 15); duration: 1 mo [none] | I: 5 d/wk for the first 2 wk post-op; C: 1 mo | 6 wk (short-term) | Lysholm score | 6.2 (IOP) |
| 6 wk (short-term) | Knee flexion | 8.2° (IOP) | ||||
| 6 wk (short-term) | Knee extension | 0.9° (HBP) | ||||
| 6 wk (short-term) | Thigh girth | 0.7 cm (HBP) | ||||
| Forster and Frost,23 1982 | Outpatient PT + HBP (n = 44) [1] | HBP (n = 42) [1] | I: 3 times/wk for 4 wk, start on the 12th postop d (duration by clinical judgment); C: not specified | 6 wk (short-term) | Knee flexion | 0.9° (IOP) |
| 6 wk (short-term) | Thigh girth | 0.4 cm (IOP) | ||||
| Absolute data | DRW | 4 d (HBP) | ||||
| Goodwin et al,37 2003a | Supervised PT + HBP (n = 44) [5] | HBP (n = 40) [10] | I: 3 times/wk for 6 wk; C: 6 wk | 50 d (short-term) | Single hop | 11.9 cm (IOP) |
| 50 d (short-term) | Vertical hop | 3.47 cm (IOP) | ||||
| Absolute data | DRW | 12.6 d (HBP) | ||||
| Hadley et al,38 2019 | Outpatient PT (n = 46) [not indicated] | Internet-based rehabilitation (n = 51) [not indicated] | I: 2 sessions/wk for 4-6 wk; C: minimum 3 times/wk (duration not specified) | 6 wk (short-term) | Lysholm score | 6.5 (IOP) |
| 6 mo (midterm) | Lysholm score | 5.67 (IOP) | ||||
| 6 wk (short-term) | IKDC | 4.6 (IOP) | ||||
| Kelln et al,39 2009b | Active RoM recovery on a bicycle ergometer + HBP (n = 16) [2] | HBP (n = 15) [1] | I: 3 times/wk (duration not specified); C; duration not specified | 1 mo (short-term) | IKDC | 9.6 (IOP) |
| 1 mo (short-term) | Knee flexion | 12.2° (IOP) | ||||
| 1 mo (short-term) | Knee extension | 0.5° (HBP) | ||||
| 1 mo (short-term) | Thigh girth | 1.9 cm (HBP) | ||||
| Kirnap et al,40 2005 | EMG biofeedback training + HBP (n = 20) [none] | HBP (n = 20), duration 1 mo [none] | I + C: 5 times/wk for 2 wk | 6 wk (short-term) | Lysholm score | 15.8 (IOP) |
| 6 wk (short-term) | Knee flexion | 7.9° (IOP) | ||||
| Moffet et al,41 1994 | Outpatient PT + HBP (n = 15) [1] | HBP (n = 16) [none] | I + C: 3 wk | 3 mo (short-term) | Lysholm score | 3 (IOP) |
| 6 mo (midterm) | Lysholm score | 2 (IOP) | ||||
| Vervest et al,42 1990 | Exercise-based outpatient PT (n = 10) [none] | HBP + verbal and written advice (n = 10) [none] | I: 30-min sessions for 3 wk; C: duration not specified | 28 d (short-term) | Lysholm score | 9.3 (IOP) |
| 28 d (short-term) | Single hop | 19.1 cm (IOP) | ||||
| 28 d (short-term) | Vertical hop | 2.4 cm (IOP) |
Abbreviations: C, control group; DRW, days to return to work; EBT, electromyography biofeedback therapy; HBP, home-based program; I, intervention group; IKDC, subjective International Knee Documentation Committee score; IOP, inpatient and/or outpatient rehabilitation; NEMS, neuromuscular electrical stimulation; PT, physical therapy; RoM, range of motion.
a
Data retrieved contacting the authors.
b
Data extracted from plots via WebPlotDigitizer version 4.3 (Ankit Rohatgi).