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Table 2 Results of pQCT reproducibility measurements (four measurements in each of nine subjects) of the third metacarpal bone

From: Reduced trabecular bone mineral density and cortical thickness accompanied by increased outer bone circumference in metacarpal bone of rheumatoid arthritis patients: a cross-sectional study

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
  1. 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.