Table 2.

Landing Error Scoring System Phi Correlation and Percent Agreement Between Expert Rater and 3-Dimensional Motion-Analysis System

Item	Correlation	Agreement	3-Dimensional, Mean ± SD	Phi
1: Ankle flexion at initial contact		89% (excellent)	−10.13° ± 12.02°	a
2: Knee flexion at initial contact	p = .608	21% (poor)	18.31° ± 7.40°	rφ = .118
3: Trunk flexion at initial contact	p = .582	74% (moderate)	−0.2° ± 5.9°	rφ = −.130
4: Knee-flexion range of motion		84% (excellent)	65.31° ± 11.53°	a
5: Trunk flexion at maximal knee flexion		95% (excellent)	6.14° ± 5.14°	a
6: Initial foot contact		42% (poor)	7-ms difference	a
7: Foot position at initial contact: toes >30° external rotation	p = .310	85% (excellent)	22.69 ± 14.88	rφ = −.233
8: Foot position at initial contact: toes >30° internal rotation		100% (excellent)	22.69 ± 14.88	a
9: Stance width < shoulder width		74% (moderate)	6 ± 3.6 cm	a
10: Stance width > shoulder width		100% (excellent)	6 ± 3.6 cm	a
11: Knee valgus at initial contact	p = .414	68% (moderate)	−0.67° ± 3.77°	rφ = –.188
12: Lateral trunk flexion at initial contact		10% (poor)	1.0 ± 0.8 cm	a
13: Knee-valgus range of motion	p = .047*	74% (moderate)	0.94° ± 9.31°	rφ = .456

^aCould not be calculated because of lack of variance in either 3-dimensional instrument or rater score.

^*Significant correlation, P < .05.