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Table 1 Anatomical parameters of the proximal humerus

From: Compared to X-ray, three-dimensional computed tomography measurement is a reproducible radiographic method for normal proximal humerus

  Mean ± SD Sex difference
  Total Male Female t value P value
3-D CT scans      
 NSA1 (°) 132.1 ± 4.4 131.4 ± 3.9 132.6 ± 4.8 −1.480 0.142
 TSH1 (mm) 7.2 ± 2.3 7.7 ± 2.6 6.8 ± 2.1 2.010 0.047*
 HHT1 (mm) 18.8 ± 2.2 20.1 ± 1.6 17.7 ± 2.0 7.040 <0.001*
 cASD1 (mm) 44.2 ± 4.1 47.3 ± 2.3 41.7 ± 3.4 10.472 <0.001*
 aASD (mm) 40.4 ± 3.6 43.1 ± 2.2 38.2 ± 2.9 10.298 <0.001*
Radiographs      
 NSA2 (°) 133.0 ± 5.2 132.1 ± 5.6 133.7 ± 4.7 −1.696 0.092
 TSH2 (mm) 10.0 ± 2.7 10.1 ± 3.0 9.7 ± 2.4 0.938 0.350
 HHT2 (mm) 23.3 ± 2.3 24.4 ± 1.9 22.4 ± 2.1 5.415 <0.001*
 cASD2 (mm) 46.4 ± 4.9 49.8 ± 4.0 43.6 ± 3.6 8.866 <0.001*
  1. SD standard deviation, NSA neck-shaft angle, TSH tuberosity-to-articular surface height, HHT humeral head thickness, cASD articular surface diameter in the coronal plane, aASD articular surface diameter in the axial plane
  2. *Statistically significant (P < 0.05)