Table 1A. .
Between-Groups Comparisons and Cohen d Effect Sizes of Sagittal-Plane Hip-Joint Angles
| Study |
Task |
ACL Reconstruction Sample Size |
Comparison Group Sample Size |
Mean ± SD |
Landing Phase |
Cohen d Effect Size (95% CI) |
Weighted Effect Size |
||
| ACL Reconstruction-Limb Hip-Flexion Angle |
ACL Contralateral-Limb Hip-Flexion Angle |
Healthy Hip-Flexion Angle |
|||||||
| Decker et al50 (2002) | Double | 11 | 11 | 22.6 ± 5.8 | NA | 29.8 ± 7.7 | IC | −1.06 (−1.96, −0.17) | −1.48 |
| Decker et al50 (2002) | Double | 11 | 11 | 29.7 ± 6.2 | NA | 31.2 ± 6.7 | JE | −0.23 (−1.07, 0.61) | −0.33 |
| Delahunt et al52 (2012) | Double | 13 | 16 | 45.9 ± 8.6 | NA | 47.5 ± 8.4 | JE | −0.19 (−0.92, 0.54) | −0.29 |
| Delahunt et al52 (2012) | Double | 14 | 14 | 29.7 ± 6.8 | NA | 34.6 ± 6.4 | JE | −0.73 (−1.49, 0.02) | −1.11 |
| Combined pooled effect size (95% CI) | −0.52 (−0.92, −0.12) | ||||||||
| Vairo et al66 (2008) | Single | 14 | 14 | 29.7 ± 9.0 | NA | 23.6 ± 6.5 | IC | 0.77 (0.00, 1.54) | 5.05 |
| Webster et al67 (2012) | Single | 15 | 11 | 32.1 ± 6.7 | NA | 27.5 ± 6.7 | IC | 0.68 (−0.12, 1.48) | 4.11 |
| Ortiz et al60 (2008) | Single | 14 | 15 | 45.9 ± 7.1 | NA | 49.5 ± 6.9 | Peak | −0.51 (−1.25, 0.23) | −3.59 |
| Vairo et al66 (2008) | Single | 14 | 14 | 31.7 ± 8.8 | NA | 24.2 ± 6.0 | Peak | 0.99 (0.20, 1.77) | 6.21 |
| Webster et al67 (2012) | Single | 15 | 11 | 52.0 ± 12.1 | NA | 50.3 ± 12.1 | Peak | 0.14 (−0.64, 0.92) | 0.89 |
| Combined pooled effect size (95% CI) | 0.40 (−0.13, 0.94) | ||||||||
| Vairo et al66 (2008) | Single | 14 | 14 | 29.7 ± 9.0 | 25.6 ± 8.3 | NA | IC | 0.47 (−0.28, 1.20) | 3.22 |
| Webster et al67 (2012) | Single | 15 | 11 | 32.1 ± 6.7 | 30.0 ± 5.9 | NA | IC | 0.33 (−0.46, 1.10) | 2.06 |
| Vairo et al66 (2008) | Single | 14 | 14 | 31.7 ± 8.8 | 27.7 ± 9.6 | NA | Peak | 0.43 (−0.32, 1.20) | 2.96 |
| Webster et al67 (2012) | Single | 15 | 11 | 52.0 ± 12.1 | 49.3 ± 12.4 | NA | Peak | 0.22 (−0.56, 1.00) | 1.39 |
| Nyland et al58 (2010), males | Single | 35 | 35 | 56.8 ± 7.2 | 57.5 ± 7.2 | NA | Peak | −0.10 (−0.57, 0.41) | −1.70 |
| Nyland et al58 (2010), females | Single | 35 | 35 | 50.8 ± 7.2 | 52.4 ± 7.5 | NA | Peak | −0.22 (−0.69, 0.34) | −3.79 |
| Orishimo et al61 (2010) | Single | 13 | 13 | 35.7 ± 8.2 | 43.4 ± 12.3 | NA | JE | −0.74 (−1.53, 0.11) | −4.50 |
| Nyland et al59 (2013), highly active | Single | 20 | 20 | 56.3 ± 11.6 | 54.0 ± 9.4 | NA | JE | 0.22 (−0.41, 0.83) | 2.17 |
| Nyland et al59 (2013), moderately active | Single | 24 | 24 | 53.7 ± 10.3 | 56.5 ± 11.0 | NA | JE | −0.26 (−0.83, 0.37) | −3.13 |
| Nyland et al59 (2013), sometimes active | Single | 26 | 26 | 51.4 ± 12.7 | 54.1 ± 11.2 | NA | JE | −0.23 (−0.77, 0.31) | −2.91 |
| Combined pooled effect size (95% CI) | −0.04 (−0.23, 0.15) | ||||||||
Abbreviations: ACL, anterior cruciate ligament; CI, confidence interval; double, double-limb landing; IC, initial contact; JE, joint excursion; NA, not applicable; single, single-limb landing.