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. Author manuscript; available in PMC: 2015 Oct 1.
Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2014 Oct;61(10):1651–1660. doi: 10.1109/tuffc.2014.006360

TABLE II.

Summary of Linear Mixed Model Variables. Location refers to the length along the canal (fractional length (FL)).

Variable Name Numerical Type Values
Location FL Integer Distal = 0
Mid-Distal = 0.25
Mid = 0.5
Mid-Proximal = 0.75
Proximal = 1
Anterior/Posterior AP Binary Anterior = 0
Posterior = 1
Ripened/Unripened Ripe Binary Ripened = 0
Unripened = 1