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Table 9 Multivariate regression analysis on bone loss variables

From: Immediate and early loading of hydrothermally treated, hydroxyapatite-coated dental implants: a 7-year prospective randomized clinical study

  Mean bone loss in 2 years (mm) Mean bone loss in 7 years (mm)
  Coefficient SE p value Coefficient SE p value
Age       
  < 40 years Ref.      
  40–60 years 0.21 0.27 0.446 0.14 0.31 0.657
  > 60 years 0.12 0.28 0.67 0.18 0.31 0.569
Location       
  Maxilla Ref.      
  Mandible − 0.03 0.25 0.89 − 0.08 0.28 0.776
Group       
  A Ref.      
  B 0.17 0.15 0.271 0.05 0.17 0.784
Gender       
  Female Ref.      
  Male 0.06 0.16 0.73 0.15 0.18 0.415
Augmentation 0.36 0.17 0.051 0.20 0.20 0.321
Mean ISQ 0.03 0.02 0.174 0.03 0.02 0.214
Torque 0.00 0.01 0.757 0.01 0.01 0.609
Length (mm)       
  8 Ref.      
  10 − 0.84 0.50 0.105 − 0.44 0.56 0.441
  11.5 − 0.98 0.51 0.068 − 0.60 0.58 0.306
  13 − 0.90 0.52 0.098 − 0.53 0.59 0.377
Diameter (mm)       
  3.7 Ref.      
  4.1 0.54 0.25 0.041 0.50 0.28 0.087
  4.7 0.35 0.23 0.13 0.26 0.25 0.31
  6 0.23 0.27 0.409 0.15 0.30 0.62
Bone Type       
  2 Ref.      
  3 − 0.04 0.17 0.803 0.01 0.19 0.976
  4 − 0.31 0.43 0.484 − 0.79 0.49 0.122
N 42.00    42.00