Table 2

Results of pQCT reproducibility measurements (four measurements in each of nine subjects) of the third metacarpal bone

Scan location

Bone parameter

Overall mean

SD

CV (%)

95% CI of CV (%)


Distal epiphysis (4%)

BMC (mg/mm)

46.4

0.76

1.64

1.18 to 2.14

Total CSA (mm2)

124.1

2.82

2.27

1.72 to 2.77

Total BMD (mg/cm3)

373.6

3.69

0.99

0.77 to 1.24

Trabecular BMD [mg/cm3]

331.0

8.10

2.45

1.96 to 2.99

Shaft (30%)

BMC (mg/mm)

52.4

0.71

1.35

0.98 to 1.70

Total CSA (mm2)

75.7

1.42

1.87

1.32 to 2.26

Cortical CSA (mm2)

38.1

0.59

1.55

1.13 to 2.10

Cortical BMD (mg/cm3)

1,166.38

10.29

0.88

0.62 to 1.12

Shaft (50%)

BMC (mg/mm)

52.8

0.44

0.84

0.62 to 1.11

Total CSA (mm2)

58.8

0.86

1.46

1.01 to 1.92

Cortical CSA (mm2)

39.3

0.40

1.02

0.67 to 1.33

Cortical BMD (mg/cm3)

1,205.8

8.51

0.71

0.41 to 0.99


Indicated are overall mean value, standard deviation (SD), Coefficient of variation (CV) and 95% confidence interval (CI) of the CV. BMC stands for bone mineral content per mm of slice thickness, CSA for cross-sectional area and BMD for volumetric bone mineral density.

Aeberli et al. Arthritis Research & Therapy 2010 12:R119   doi:10.1186/ar3056

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