Table 1

Reproducibility of wrist and metacarpalphalangeal three-dimensional measures across sessions

3D measure

Wrist

Metacarpophalangeal

1

2

3

4

5

6

7

1

2

3

4

5

6

Volume, ml

Mean, ml

55.8

47.8

38.5

39.2

55.0

53.3

66.8

16.7

4.3

8.9

4.0

9.5

7.3

SD, ml

0.7

0.6

0.2

0.2

0.6

2.1

0.5

0.2

0.02

0.1

0.1

0.1

0.1

CV (%)

1.3

1.2

0.6

0.4

1.0

4.0

0.8

1.3

0.4

1.5

1.3

0.9

2.0

SDI, mm

Mean, mm

10.3

9.3

7.3

7.5

9.0

9.8

10.8

6.7

4.2

5.1

4.5

5.4

4.9

SD, mm

0.2

0.1

0.1

0.03

0.2

0.1

0.02

0.1

0.04

0.1

0.03

0.05

0.04

CV (%)

2.1

1.0

1.2

0.4

1.8

0.7

0.2

1.9

1.0

1.0

0.7

0.9

0.8

3D, three-dimensional; CV, coefficient of variation; SD, standard deviation; SDI, surface distribution index.

Spalding et al. Arthritis Research & Therapy 2008 10:R10   doi:10.1186/ar2360