Skip to main content

Table 3 Multiple median regression analysis for bone material properties

From: At the moment of occurrence of a fragility hip fracture, men have higher mechanical properties values in comparison with women

Variables

Age

Gender

Measure

βa

95% Confidence Interval

p- valueb

βa

95% Confidence Interval

p- valueb

Ultimate stress, σ ULT [MPa]

0.02

-0.11 <  β < 0.16

0.72

-2.29

-5.43 < β < 0.86

0.15

Young’s modulus, E [MPa]

-6.10

-12.54 < β < 0.34

0.06

-97.72

-216.06 < β < 20.62

0.10

Energy to failure, W ULT [MJ/m3]

0.01

0.00 < β < 0.02

0.01

-0.09

-0.22 <  β < 0.03

0.13

Variables

Age-group

Gender

Ultimate stress, σ ULT [MPa]

0.57

-0.68 <  β < 1.81

0.37

-2.00

-5.27 < β < 1.27

0.23

Young’s modulus, E [MPa]

-34.89

-124.20 <  β < 54.42

0.44

-104.49

-238.15 < β < 29.17

0.12

Energy to failure, W ULT [MJ/m3]

0.09

0.02 < β < 0.16

0.02

-0.13

-0.25 < β < -0.01

0.04

  1. aCoefficients obtained by QUANTREG procedure.
  2. bStatistical significance p < 0.05.
  3. Note: Two multiple median regression models were performed. In the first model, each bone material property (the dependent variable) was analysed with age and gender as covariate variables. In the second model, these bone material parameters were analysed with age-group and gender as covariate variables.