Skip to main content

Table 3 Univariate and multivariate regression results for percentage dense area among Aboriginal (n = 499) and non-Aboriginal (n = 493) women with digitized film mammograms

From: The distribution and determinants of mammographic density measures in Western Australian aboriginal women

Percentage dense area (%)a

Aboriginal (n = 499)

Non-Aboriginal (n = 493)

Characteristic

Univariate

Multivariate

Univariate

Multivariate

β (SE)

P valueb

β (SE)

P valueb

β (SE)

P valueb

β (SE)

P valueb

Age at mammogram (per year)

−  0.057 (0.0093)

<  0.001

− 0.047 (0.0073)

<  0.001

− 0.087 (0.010)

<  0.001

− 0.043 (0.0070)

<  0.001

Non-dense area (per cm2)

− 0.024 (0.0014)

<  0.001

− 0.023 (0.0013)

<  0.001

− 0.032 (0.0012)

<  0.001

− 0.029 (0.0012)

<  0.001

HT use in the last 12 months

0.42 (0.32)

0.190

  

0.089 (0.24)

0.707

  

Family history of breast cancer

0.37 (0.38)

0.328

  

−0.031 (0.34)

0.928

  

ARIAc

 

0.458

 

0.390

 

0.016

 

0.052

 Major city

Reference

 

Reference

 

Reference

 

Reference

 

 Inner and outer regional

0.097 (0.27)

 

0.051 (0.20)

 

− 0.23 (0.26)

 

− 0.13 (0.16)

 

 Remote

0.14 (0.27)

 

− 0.054 (0.20)

 

0.42 (0.26)

 

0.21 (0.17)

 

 Very remote

− 0.19 (0.23)

 

− 0.22 (0.18)

 

− 0.37 (0.25)

 

− 0.22 (0.16)

 

Advantage and Disadvantage indexd,e

 

0.074

 

0.073

 

0.002

 

0.075

 1 (lowest)

Reference

 

Reference

 

Reference

 

Reference

 

 2

0.48 (0.20)

 

0.36 (0.15)

 

0.53 (0.24)

 

0.18 (0.15)

 

 3

0.41 (0.25)

 

0.29 (0.19)

 

0.88 (0.26)

 

0.36 (0.16)

 

 4 (highest)

0.43 (0.39)

 

− 0.042 (0.30)

 

0.91 (0.30)

 

0.42 (0.19)

 

Disadvantage indexd,f

 

0.002

 

0.005

 

0.021

 

0.114

 1 (lowest)

Reference

 

Reference

 

Reference

 

Reference

 

 2

0.69 (0.20)

 

0.52 (0.15)

 

0.45 (0.24)

 

0.16 (0.15)

 

 3

0.52 (0.24)

 

0.35 (0.18)

 

0.64 (0.25)

 

0.30 (0.16)

 

 4 (highest)

0.82 (0.42)

 

0.16 (0.32)

 

0.81 (0.30)

 

0.41 (0.19)

 

Economic Resources indexd,g

 

0.020

 

0.002

 

0.054

 

0.185

 1 (lowest)

Reference

 

Reference

 

Reference

 

Reference

 

 2

0.47 (0.20)

 

0.55 (0.15)

 

0.49 (0.24)

 

0.30 (0.15)

 

 3

0.57 (0.25)

 

0.42 (0.19)

 

0.67 (0.25)

 

0.25 (0.16)

 

 4 (highest)

0.71 (0.38)

 

0.21 (0.29)

 

0.38 (0.31)

 

0.088 (0.19)

 

Education and Occupation indexd,h

 

0.140

 

0.657

 

<  0.001

 

0.044

 1 (lowest)

Reference

 

Reference

 

Reference

 

Reference

 

 2

0.33 (0.21)

 

0.19 (0.16)

 

0.51 (0.29)

 

0.092 (0.19)

 

 3

0.55 (0.25)

 

0.18 (0.19)

 

0.58 (0.30)

 

0.24 (0.19)

 

 4 (highest)

0.48 (0.37)

 

0.15 (0.28)

 

1.4 (0.33)

 

0.50 (0.21)

 
  1. SEIFA and ARIA indices were considered one at a time in all multivariate analyses to avoid collinearity. Effect measures in italics were included in the final model. Other effect measures were adjusted for age at mammogram and non-dense area
  2. SE standard error, HT hormone therapy
  3. aSquare root transformed
  4. bP values are based on a − 2 log likelihood test
  5. cAccessibility/Remoteness Index of Australia (ARIA) scores
  6. dSEIFA scores are on a scale from 1 to 4, where 1 indicates the lowest 10% of the population in the state (least advantaged and most disadvantaged, most disadvantaged, least economic resources and least education and occupation opportunities) and 4 indicates the highest 30% of the population in the state (most advantage and least disadvantaged, least disadvantaged, most economic resources and most education/occupation opportunities)
  7. eIndex of Relative Socio-Economic Advantage and Disadvantage based on Western Australian state rankings
  8. fIndex of Relative Socio-Economic Disadvantage based on Western Australian state rankings
  9. gIndex of Economic Resources based on Western Australian state rankings
  10. hIndex of Education and Occupation based on Western Australian state rankings
Back to article page

Breast Cancer Research

ISSN: 1465-542X

Contact us