Table 1.

Normal sagittal parameters: global and regional

Sagittal parameter	Average measurement
C2–7 SVA	15+11.2 mm
C7 SVA	0+3 cm
C1–2 lordosis	35° (range, 8 to 55°)
C2–7 lordosis	13° (range, 0 to 54°)
T5–12 kyphosis	30° (range, 20 to 50°)
T10–L2	0°
T12–S1	60° (range, 31 to 79°)
Sacral slope	40+9°
Pelvic tilt	11°
Pelvic incidence	52+9°

SVA: sagittal vertical axis