Table 1:
Anteroposterior diameter (mm)
Hypoplasia Group
Control Group
L4
34.1 (range, 27.5–45.4)
33.1 (range, 26.1–38.6)
L5
31.1 (range, 21.8–39.0)
33.0 (range, 25.8–37.9)
S1
35.5 (range, 26.4–44.2)
33.9 (range, 27.4–42.1)