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Table 2 Bone density and changes between measurements at 10 days, 3 months and 12 months postop

From: Maintenance of bone mineral density after implantation of a femoral neck hip prosthesis

ROI 10 days 3 months   10 d-3 mo   12 months   10 d- 12 mo  
  mean bone density in g/cm2 SD mean bone density in g/cm2 SD mean change in %   mean bone density in g/cm2 SD mean change in %  
1 0.76 0.14 0.73 0.13 -3.35 s 0.75 0.13 -0.76 s
2 0.81 0.14 0.79 0.14 -2.99 s 0.82 0.14 1.60 s
3 1.06 0.19 1.05 0.19 -1.09 s 1.08 0.19 2.84 s
4 1.60 0.23 1.57 0.22 -2.28 s 1.60 0.23 -0.35 ns
5 1.52 0.19 1.49 0.19 -3.01 s 1.51 0.19 -0.77 ns
6 1.51 0.20 1.47 0.20 -3.71 s 1.50 0.19 -0.69 s
7 1.08 0.12 1.06 0.12 -2.77 s 1.08 0.12 0.67 ns
1–3 lat 0.82 0.14 0.80 0.14 -2.36 s 0.83 0.14 1.37 s
5–7 med 1.14 0.14 1.10 0.13 -3.18 s 1.13 0.13 -0.40 ns
1–7 all 1.05 0.14 1.02 0.13 -2.74 s 1.05 0.13 0.19 ns
  1. Mean values of bone mineral density and mean values of changes in percent between the 10-day- and 3-month-examinations, as well as between the 10-day- and 12-month-examinations
  2. ROI: Regions of Interest 1–7 and combined zones laterally (1–3 lat), medially (5–7 med) and overall (1–7 all)
  3. SD: standard deviation; s: significant, ns: not significant (Wilcoxon signed-ranks test, t = 0.05)