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Table 1 Measurement results for the ideal position of an infra-acetabular screw

From: A guideline for placement of an infra-acetabular screw based on anatomic landmarks via an intra-pelvic approach

N = 40 Female Male Level of significance female compared to male patients Total
Distance medial IPIS (in mm) 10.6 ± 1.22 (8.5–14.1) 10.2 ± 0.73 (8.6–12.0) p = 0.770 10.4 ± 1.02 (8.5–14.1)
Distance caudal IPIS (in mm) 10.2 ± 1.61 (3.0–13.2) 10.2 ± 1.07 (8.4–13.7) p = 0.883 10.2 ± 1.36 (3.0–13.70)
Sagittal angle (α) to PIP (in degrees) 9.6 ± 1.16 (6.9–12.4) 11.2 ± 1.57 (8.8–15.1) p = 0.000 10.4 ± 1.58 (6.9–15.10)
Axial angle (β) to PIP (in degrees) 71.4 ± 3.55 (66.7–89.4) 69.5 ± 2.42 (62.3–74.3) p = 0.006 70.5 ± 3.17 (62.3–89.4)
Screw length (in mm) 74.8 ± 3.4 (70.20–84.00) 83.9 ± 2.05 (79.80–88.30) p = 0.000 79.3 ± 5.37 (70.2–88.30)