Table 2

Scoring results for each reader and interreader reproducibility analysis for dual-energy computed tomography urate volume and volume change measurements
Parameter Volume at baseline Volume at year 1 Change in volume at year 1
Reader 1, median (IQR) 0.59 cm3 (0.14 to 2.3) 0.60 cm3 (0.21 to 2.2) 0.00 cm3 (-0.44 to 0.48)
Reader 1, mean (SD) 2.9 cm3 (7.1) 2.3 cm3 (5.2) -0.58 cm3 (2.6)
Reader 2, median (IQR) 0.42 cm3 (0.13 to 2.1) 0.29 cm3 (0.12 to 1.8) -0.03 cm3 (-0.37 to 0.07)
Reader 2, mean (SD) 2.8 cm3 (6.9) 2.1 cm3 (5.2) -0.68 cm3 (2.5)
Average (reader 1 and reader 2), median (IQR) 0.49 cm3 (0.16 to 2.2) 0.51 cm3 (0.18 to 2.1) -0.01 cm3 (-0.40 to 0.28)
Interreader intraclass correlation coefficient (95% CI) 1.0 (0.99 to 1.0) 0.99 (0.99 to 1.0) 0.93 (0.89 to 0.96)
Interreader bias (SD) -0.18 cm3 (0.63) -0.27 cm3 (0.62) -0.10 cm3 (0.93)
Smallest detectable difference, average measurement (%) 44.1% 55.2% 289%
Smallest detectable change 0.91 cm3

Rajan et al.

Rajan et al. Arthritis Research & Therapy 2013 15:R160   doi:10.1186/ar4343

Open Data