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. 2011 Feb;40(2):67–75. doi: 10.1259/dmfr/27546065

Table 2. Reliability statistics.

Reliability Cronbach's alpha Inter-item correlation matrix Percentage of sample with absolute difference larger than 0.5 mm
Direct bone measurements (intraexaminer) 0.999 0.999 2
MDCT (intraexaminer) 0.997 0.994 25
MDCT (interexaminer) 0.992 0.985 59
CBCT (intraexaminer) 0.997 0.995 10
CBCT (interexaminer) 0.979 0.958 75

MDCT, multidetector CT; CBCT, cone beam CT