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Table 3 The validity findings for the X-, Y- and Z-coordinates for trials two to nine (n = 107)

From: Development of a cost effective three-dimensional posture analysis tool: validity and reliability

Scatterplot graphs

PPMCC

Bland-Altman method

0.95 – 1.00

Estimated bias

Mean difference (d)

1.98 mm

Variation

SD of the differences (s)

10.0 mm

CV

s/d

5.07

Limits of agreement

Upper limit (d + 1.96 s)

21.64 mm

Lower limit (d-1.96 s)

-17.68 mm

Width

UL - LL

39.32 mm

1.00

Estimated bias

Mean difference (d)

-0.77 mm

Variation

SD of the differences (s)

2.7 mm

CV

s/d

3.45

Limits of agreement

Upper limit (d + 1.96 s)

4.44 mm

Lower limit (d-1.96 s)

-5.98 mm

Width

UL - LL

10.42 mm

0.98 – 1.00

Estimated bias

Mean difference (d)

0.71 mm

Variation

SD of the differences (s)

1.9 mm

CV

s/d

2.73

Limits of agreement

Upper limit (d + 1.96 s)

4.51 mm

Lower limit (d-1.96 s)

-3.09 mm

Width

UL - LL

7.60 mm