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Table 1 Absolute and relative changes of bone mineral density by modified DeLee and Charnley zone and follow-up time point, expressed as means (standard deviations)

From: Peri-acetabular bone remodelling after uncemented total hip arthroplasty with monoblock press-fit cups: an observational study

DeLee and Charnley zone 3 months 12 months 24 months P valuea
  Absolute change (g/cm2) Relative change (%) Absolute change (g/cm2) Relative change (%) Absolute change (g/cm2) Relative change (%)  
I −0.4 (0.3) −19.0 (9.0) −0.4 (0.3) −18.0 (13.0) − 0.4 (0.3) −17.1 (11.0) <  0.0001
II −0.3 (0.4) −13.1 (19.0) − 0.2 (0.6) − 8.0 (30.0) − 0.1 (0.6) −4.0 (29.0) 0.171
III − 0.3 (0.1) −17.0 (9.0) − 0.3 (0.2) −16.0 (10.3) − 0.2 (0.3) − 15.1 (17.0) <  0.0001
  1. aDifference to baseline at 24-month follow-up examination