Fig. 2From: Correlations between the feature of sagittal spinopelvic alignment and facet joint degeneration: a retrospective studyMeasurement of height of lumbar intervertebral disc. The height of the lumbar intervertebral disc was calculated by dividing the sum of the heights of the anterior, middle, and posterior intervertebral discs by 3 (a + b + c/3)Back to article page