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. 2019 Oct 10;10(7):881–887. doi: 10.1177/2192568219880822

Table 4.

Cronbach’s Alpha Values by Measurement.a

Measurement Cronbach’s Alpha Average Cronbach’s Alpha
Disc anterior-posterior .851 .672
Disc midwidth .381
Canal anterior-posterior .659
Canal midwidth .798
Disc area .707 .785
Canal area .863

a Linear measurements on average have a lower reliability than multipoint measurements using AGFA-IMPACS.