Percentage difference in isokinetic strength assessment at return to sport in the injured compared with the uninjured leg
| Platelet-rich plasma n=24 | Platelet-poor plasma n=29 | No injection n=26 | ||||
|---|---|---|---|---|---|---|
| Mean±SD | 95% CI | Mean±SD | 95% CI | Mean±SD | 95% CI | |
| Q conc 60°/s (%) | 0.7±13.7 | −5.1 to 6.5 | −3.8±17.9 | −10.6 to 3.0 | −6.6±17.4 | −13.7 to 0.4 |
| H conc 60°/s (%) | −6.8±13.2 | −12.4 to −1.2 | −7.1±12.6 | −11.8 to −2.3 | −9.2±16.0 | −15.7 to −2.8 |
| Q conc 300°/s (%) | −0.9±14.0 | −6.8 to 5.1 | −1.9±17.8 | −8.8 to 5.1 | −3.1±14.3 | −8.9 to 2.6 |
| H conc 300°/s (%) | 0.5±12.5 | −4.7 to 5.8 | 3.7±18.7* | −3.6 to 10.9 | −5.8±18.4 | −13.2 to 1.6 |
| H ecc 60°/s (%) | −5.2±18.7 | −13.5 to 3.1 | −7.9±14.4*† | −13.6 to −2.2 | 2.5±17.1 | −4.8 to 9.7 |
*Significantly higher compared with the physiotherapy group.
†p Values based on non-parametric test.
H conc, concentric hamstrings; H ecc, eccentric hamstrings; Q conc, concentric quadriceps.