Table 1 Definition for each variable including abbreviation and name.

From: Comparison of measurements made on dry bone and digital measurements in Anatomage for the sacral bone in a Spanish population

SCW

Maximum sacral canal width

Maximum width established between both attachment points of the body and the transverse processes in S1 within the canal

TL

Maximum transverse line width

Maximum crest distance between the sacral vertebrae. Includes superior (S), Mid-superior (MS), Mid-inferior (MI), and Inferior (I)

LC

Maximum lateral crest length

Maximum length from the upper end of the transverse process from S1 to the lower end of S5

MSW

Maximum sacral width

Distance between the most lateral points of the wings

ML

Maximum length

Length from the upper midpoint of the promontory to the apex of the sacrum, taken in the sagittal plane

AFH

Height of the articular facet

Distance from the highest point to the lowest of the articular facet of the articular process

ASH

Height of the auricular surface

Distance between the upper and lower points of the articular facet, taken in anatomical position

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