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Table 1 Summary of the statistical analyses

From: The analysis of knee joint loading during drop landing from different heights and under different instruction sets in healthy males

Peak measures

Interaction df(2,38)

Height df(1,19)

Instruction df(2,38)

F

p value

Effect size

F

p value

Effect size

F

p value

Effect size

Knee flexion angle (°)

1.6

0.21

0.01

T

206.2

<0.01

0.30

L

103.0

<0.01

0.57

L

Vertical nGRF (N/kg)

0.5

0.64

<0.01

T

104.8

<0.01

0.27

L

86.8

<0.01

0.53

L

Knee compression force (N/kg)

0.1

0.89

<0.01

T

68.0

<0.01

0.17

M

90.8

<0.01

0.53

L

Knee flexion moment (Nm/kg)

16.5

<0.01

0.05

S

230.2

<0.01

0.45

L

15.8

<0.01

0.05

S

Measures at the peak knee flexion moment

 Knee abduction moment (Nm/kg)

2.4

0.10

0.01

T

44.3

<0.01

0.14

M

0.2

0.82

<0.01

T

 Knee external rotation moment (Nm/kg)

2.2

0.13

0.01

T

14.7

<0.01

0.06

S

5.8

<0.01

0.02

T

 Ankle flexion moment (Nm/kg)

2.6

0.08

0.01

T

105.1

<0.01

0.37

L

0.5

0.60

0.01

T

 Hip extension moment (Nm/kg)

1.1

0.36

<0.01

T

1.7

0.21

0.01

T

6.5

<0.01

0.05

S

 Ankle power (W/kg)

5.3

0.01

0.03

S

85.7

<0.01

0.48

L

3.3

<0.05

0.05

S

 Knee power (W/kg)

9.4

<0.01

0.03

S

139.3

<0.01

0.63

L

7.0

<0.01

0.06

S

 Hip power (W/kg)

10.3

<0.01

0.06

S

2.8

0.11

0.04

S

12.2

<0.01

0.07

S

Measures of trial order effect

Order df(1,19)

        

F

p value

Effect size

        

 Peak knee compression force (N/kg)

0.2

0.701

<0.01

T

        

 Peak knee flexion moment (Nm/kg)

0.56

0.465

0.01

T

        
  1. The effect sizes are reported using generalized eta squared. T trivial, S small, M moderate, L large