. 2018 Feb;53(2):144–159. doi: 10.4085/1062-6050-334-16

Table 2B. .

Between-Groups Comparisons and Cohen d Effect Sizes of Frontal-Plane Knee-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
Study	Task	ACL Reconstruction Sample Size	Comparison Group Sample Size	ACL Reconstruction-Limb Knee-Adduction Angle	ACL Contralateral-Limb Knee-Adduction Angle	Healthy Knee-Adduction Angle	Landing Phase	Cohen d Effect Size (95% CI)	Weighted Effect Size
Goerger et al⁵⁵ (2014)	Double	20	20	−4.2 ± 5.7	NA	−0.4 ± 5.7	Peak	−0.65 (−1.28, −0.01)	−6.66
Delahunt et al⁵¹ (2012)	Double	13	16	3.0 ± 4.5	NA	8.9 ± 6.4	JE	−1.05 (−1.83, −0.27)	−6.16
Goerger et al⁵⁵ (2014)	Double	20	20	−11.7 ± 7.7	NA	−6.9 ± 7.7	JE	−0.61 (−1.24, 0.02)	−5.84
Combined pooled effect size (95% CI)									−0.73 (−1.12, −0.34)
Ortiz et al⁶⁰ (2008)	Single	14	15	−7.2 ± 5.8	NA	−9.8 ± 5.3	Peak	0.49 (−0.25, 1.23)	3.46
Webster et al⁶⁷ (2012)	Single	15	11	−3.9 ± 3.7	NA	−3.1 ± 3.2	Peak	−0.23 (−1.01, 0.55)	−1.43
Delahunt et al⁵² (2012)	Single	14	14	−3.6 ± 3.9	NA	−1.1 ± 2.7	JE	−0.76 (−1.52, 0.00)	−5.09
Combined pooled effect size (95% CI)									−0.15 (−0.88, 0.56)
Webster et al⁶⁷ (2012)	Single	15	11	−3.9 ± 3.7	−3.1 ± 6.1	NA	Peak	−0.16 (−0.94, 0.60)	−0.55
Combined pooled effect size (95% CI)									NA

Abbreviations: ACL, anterior cruciate ligament; CI, confidence interval; double, double-limb landing; JE, joint excursion; NA, not applicable; single, single-limb landing.