TABLE 5.
Bivariate Correlations Between Other Outcomes and ACL-RSI Score at 6 Months Postoperatively a
| 6-Mo Outcomes | n | r | P Value |
|---|---|---|---|
| PROs | |||
| IKDC subjective score | 97 | 0.68 | <.001 |
| Worst pain level (3 mo to 6 mo) | 96 | -0.36 | <.001 |
| Today’s pain level (at 6 mo) | 96 | -0.40 | <.001 |
| Functional outcomes | |||
| Strength: dynamometer (surgical limb) b | |||
| Hamstring | 97 | 0.42 | <.001 |
| Quadriceps | 97 | 0.34 | <.001 |
| Hamstring to quadriceps ratio | 97 | 0.11 | .30 |
| AP laxity difference | 96 | -0.17 | .10 |
| Hop testing b | |||
| Single hop | 77 | 0.23 | .04 |
| Triple hop | 70 | -0.02 | .89 |
| 6-m timed hop | 72 | -0.12 | .30 |
| Crossover hop | 63 | 0.07 | .54 |
a Bolded P values indicate statistical significance (P < .05). ACL, anterior cruciate ligament; ACL-RSI, ACL--Return to Sport after Injury; AP, anteroposterior; IKDC, International Knee Documentation Committee; PRO, patient-reported outcome.
b Strength and hop test results are presented as percentage of the contralateral side.