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

Table 2C. .

Between-Groups Comparisons and Cohen d Effect Sizes of Transverse-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 Internal-Rotation Angle	ACL Contralateral-Limb Knee Internal-Rotation Angle	Healthy Knee Internal-Rotation Angle	Landing Phase	Cohen d Effect Size (95% CI)	Weighted Effect Size
Delahunt et al⁵² (2012)	Double	14	14	13.6 ± 0.50	NA	15.2 ± 7.0	JE	−0.21 (−0.94, 0.53)	−0.77
Goerger et al⁵⁵ (2014)	Double	20	20	13.2 ± 8.2	NA	17.1 ± 8.2	JE	−0.47 (−1.10, 0.16)	−1.30
Combined pooled effect size (95% CI)									−0.39 (−0.87, 0.07)
Sato et al⁶³ (2013)	Double	10	10	10.3 ± 4.9	12.4 ± 4.3	NA	Peak	−0.46 (−1.34, 0.40)	−2.22
Goitis et al⁶⁸ (2013)	Double	20	20	20.3 ± 2.8	15.2 ± 2.1	NA	JE	2.05 (1.29, 2.81)	13.63
Lam et al⁴² (2011)	Double	10	10	8.9 ± 3.0	8.2 ± 2.6	NA	JE	0.25 (−0.63, 1.10)	1.24
Combined pooled effect size (95% CI)									0.62 (−0.88, 2.14)
Ortiz et al⁶⁰ (2008)	Single	14	15	−10.5 ± 10.7	NA	5.6 ± 5.1	Peak	−1.94 (−2.83, −1.06)	−1.07
Webster et al⁶⁷ (2012)	Single	15	11	21.1 ± 17.8	NA	24.3 ± 20.5	Peak	−0.17 (−0.95, 0.61)	−0.10
Delahunt et al⁵¹ (2012)	Single	13	16	12.13 ± 6.0	NA	12.0 ± 6.6	JE	0.02 (−0.71, 0.75)	0.01
Combined pooled effect size (95% CI)									−0.67 (−1.84, 0.48)
Webster et al⁶⁷ (2012)	Single	15	11	21.1 ± 17.8	22.7 ± 18.8	NA	Peak	−0.09 (−0.87, 0.70)	−0.08
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.