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. Author manuscript; available in PMC: 2017 Nov 1.
Published in final edited form as: Med Phys. 2015 Jul;42(7):3932–3947. doi: 10.1118/1.4921734

Table V.

ANOVA results on the QIBA Profile set. Interaction factors are denoted in parenthesis.

Factors: (1) size, (2) shape, (3) HU, (4) Slice thickness × collimation, (5)
mAs, (6) pitch, and (7) kernel

Model Without interaction With two-factor interactions
Variables 1–7 1–7 and interactions
R-squared 0.19 0.39
Nonsignificant variable (p > 0.0083) 6–7 6, 7, (1, 4), (1, 7), (2, 6), (2, 7), (4, 7), (5, 6), (5, 7), (6, 7)