Table 5.

Intra- and inter-reliability on the measurement of DECT values

	Reader 1		Reader 2
	ICC	95% CI	ICC	95% CI
Intra-observer (%)
80-keV CT value	97.9	96.8–98.5	99.0	98.6–99.3
Mixed-keV CT value	99.2	98.9–99.5	99.4	99.2–99.6
Rho	99.0	98.5–99.4	99.0	98.5–99.4
Zeff	98.1	97.2–98.7	97.8	96.6–98.5
Inter-observer (%) †
80-keV CT value	97.5 [96.3–98.3]
Mixed-keV CT value	96.4 [94.8–97.6]
Rho	96.9 [95.4–97.9]
Zeff	83.5 [76.5–88.6]

ICC, Intra-class correlation coefficient; CI, Confidence interval

^†Data expressed as percentages, with raw data in parentheses and 95% CIs in brackets