Table 2 Results of linear-regression analysis using logarithmically transformed aluminium values as independent variables, and bone-mineral density (BMD) and content (BMC) of the total hip and femoral neck as dependent variables.
Univariate model β (SE) | 95% confidence interval of β | p-value | Multivariate model β (SE) | 95% confidence interval of β | p-value | ||
|---|---|---|---|---|---|---|---|
Unit of exposure | |||||||
BMD femoral neck (g/cm 2 ) | ** | -0.098 (0.02) | -0.137; -0.059 | <0.0001 | -0.023 (0.015) | -0.054; 0.008 | 0.14 |
*** | -0.039 (0.008) | -0.055; -0.024 | <0.0001 | -0.010 (0.006) | -0.022: 0.003 | 0.13 | |
BMD total hip (g/cm 2 ) | ** | -0.088 (0.021) | -0.131; -0.045 | 0.0001 | -0.013 (0.015) | -0.044; 0.018 | 0.39 |
*** | -0.035 (0.009) | -0.052; -0.018 | 0.0001 | -0.006 (0.007) | -0.020; 0.007 | 0.36 | |
BMC femoral neck (g/cm) | ** | -0.56 (0.14) | -0.84;-0.29 | 0.0001 | -0.09 (0.11) | -0.32; 0.13 | 0.41 |
*** | -0.22 (0.05) | -0.33;-0.12 | 0.0001 | -0.04 (0.05) | -0.14; 0.05 | 0.38 | |
BMC total hip (g/cm) | ** | -3.00 (0.95) | -4.91; -1.10 | 0.003 | -0.31 (0.63) | -1.56; 0.95 | 0.63 |
*** | -1.20 (0.38) | -1.96; -0.44 | 0.003 | -0.17 (0.28) | -0.74; 0.41 | 0.57 | |
Width femoral neck (cm) | ** | -0.076 (0.083) | -0.242; -0.089 | 0.36 | 0.025 (0.084) | -0.14; 0.19 | 0.77 |
*** | -0.031 (0.033) | -0.097; 0.036 | 0.36 | 0.010 (0.034) | -0.058; 0.078 | 0.77 | |
Area femoral neck (cm 2 ) | ** | 0.07 (0.51) | -0.95; 1.09 | 0.89 | 0.26 (0.34) | -0.42; 0.95 | 0.44 |
*** | 0.03 (0.20) | -0.38; 0.44 | 0.89 | 0.11 (0.14) | -0.17; 0.38 | 0.44 |