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Table 1 Shows the intraclass correlations, the t-test outcomes and the LOA’s for the left and right leg

From: Reliability of the Q Force; a mobile instrument for measuring isometric quadriceps muscle strength

  

Session 1

Session 2

diff

 

P value

   
  

Mean (SD)

Mean (SD)

Mean (SD)

t-test

ICC

L. Loa

U. Loa

Loa % Mean

PT

left

63.1 (27.2)

70.7 (29.2)

7.6 (13.4)

0.0078

0.89

−18.6

33.8

39.1

PT

right

66.1 (30.4)

74.8 (34.2)

8.6 (9.1)

0.0001

0.96

−9.2

26.4

25.1

FPT

left

62.5 (27.0)

70.2 (29.1)

7.7 (13.5)

0.0077

0.88

−18.8

34.2

39.9

FTP

right

65.6 (30.3)

74.0 (34.1)

8.4 (9.1)

0.0001

0.96

−9.4

26.2

25.5

MPT

left

58.5 (26.0)

66.4 (28.5)

7.9 (12.5)

0.0037

0.89

−16.6

32.4

39.2

MPT

right

62.0 (29.1)

69.9 (32.9)

7.9 (9.0)

0.0001

0.96

−9.7

25.5

26.7

APT

left

58.3 (26.2)

65.9 (28.6)

7.6 (12.9)

0.0058

0.80

−17.6

32.8

38.7

APT

right

61.8 (29.6)

70.2 (33.5)

8.4 (9.1)

0.0001

0.96

−9.4

26.2

26.9

  1. PTL Peak Torque, FTP Filtered Peak Torque, MPT Median Peak Torque, APT Average Plateau Peak Torque, expressed in Newton, * Significant level; ≤ 0.01, ICC; Intraclass Correlation Coefficient, L.LOA; Lower Limits of Agreement, U. LOA upper Limits of Agreement. LOA as percentage of mean of session1 and session 2