Table 8 Comparison of M4SI screw parameters between genders
From: Three-dimensional digital anatomical measurement of modified sacroiliac screws
Parameter | Right (Mean ± SD) | Left (Mean ± SD) | ||||||
|---|---|---|---|---|---|---|---|---|
Male (n = 50) | Female (n = 50) | Statistical value | P value | Male (n = 50) | Female (n = 50) | Statistical value | P value | |
R (mm) | 3.51 ± 0.29 | 3.35 ± 0.33 | 2.49# | 0.01 | 3.52 ± 0.32 | 3.29 ± 0.42 | 2.01※ | 0.04 |
L (mm) | 89.32 ± 9.77 | 88.78 ± 9.26 | 2.17※ | 0.03 | 91.39 ± 8.69 | 88.63 ± 8.25 | 2.24※ | 0.03 |
AP (mm) | 50.90 ± 7.49 | 48.08 ± 7.18 | 2.06※ | 0.04 | 50.89 ± 6.98 | 46.76 ± 7.37 | 2.87# | < 0.01 |
BS (mm) | 26.90 ± 2.92 | 25.83 ± 3.22 | 1.74# | 0.09 | 27.73 ± 3.25 | 27.11 ± 2.91 | 1.01# | 0.31 |
α (°) | 32.99° ± 5.03° | 34.98° ± 5.44° | 1.89# | 0.04 | 34.21° ± 4.98° | 36.13° ± 4.56° | 2.01# | 0.04 |
β (°) | 25.07° ± 8.87° | 22.83° ± 8.48° | 1.29# | 0.19 | 24.33° ± 8.66° | 21.51° ± 8.21° | 1.67# | 0.09 |
γ (°) | 45.34° ± 6.89° | 45.24° ± 6.04° | 0.07# | 0.94 | 45.16° ± 5.37° | 45.04° ± 5.55° | 0.11# | 0.92 |