Table 3.

Characteristics of Morphological Variation in the Fifth Lumbar Vertebra Represented by Each Principal Component (PC7 to PC11).

Principal Component	Characteristics observed with larger principal component scores
7	Longer width of the superior vertebral body surface
	Horizontally oriented spinous process
	Upward-oriented transverse processes
8	Shorter anteroposterior length of the superior and inferior vertebral body surfaces
	Longer pedicle length
	Higher height of the posterior vertebral body
	Smaller dorsal wedge shape of the vertebral body
	Shorter spinous process and isthmus length
	Horizontally oriented transverse processes
9	Shorter width of the superior and inferior vertebral body surfaces
	Longer anteroposterior length of the superior and inferior vertebral body surfaces
	Lower height of the anterior vertebral body
	Smaller dorsal wedge shape of the vertebral body
	Greater vertical distance between the superior and inferior articular processes
10	Shorter anteroposterior length of the superior and inferior vertebral body surfaces
	Coronally oriented transverse process
11	Shorter anteroposterior length of the superior vertebral body surface
	Longer width of the inferior vertebral body surface
	Sagittally oriented facet joints