From: Increased pelvic incidence may lead to arthritis and sagittal orientation of the facet joints at the lower lumbar spine
Overall
Females
Males
Mean PI
P Value
≤ 40 years
314
103
211
50.1°
0.07
> 40Â years
282
90
192
51.7°
≤ 30 years
185
57
128
50.0°
0.35
31-50Â years
226
70
156
50.6°
51-70Â years
124
40
84
51.3°
≥ 71 years
61
26
35
53.3°