Table 3.
Tibia lead (n=550) | Patella lead (n=548) | |||||||
---|---|---|---|---|---|---|---|---|
Variable | β | SE | P | Partial R2a | β | SE | P | Partial R2a |
Intercept | -16.558 | 16.504 | 0.32 | -29.827 | 19.140 | 0.12 | ||
Blood lead | 1.064 | 0.126 | <.0001 | 0.0924 | 1.854 | 0.186 | <0.0001 | 0.1253 |
Age | 0.539 | 0.080 | <.0001 | 0.0585 | 0.861 | 0.118 | <.0001 | 0.0669 |
Educationb | ||||||||
High school diploma | -4.070 | 1.745 | 0.02 | 0.0070 | -4.249 | 2.574 | 0.10 | 0.0034 |
≥ 4 years of college | -7.173 | 2.093 | 0.0007 | 0.0152 | -8.634 | 3.101 | 0.006 | 0.0097 |
White collar | -2.962 | 1.180 | 0.01 | 0.0082 | -4.020 | 1.758 | 0.02 | 0.0066 |
Cumulative cigarette smoking (pack-years) | 0.023 | 0.026 | 0.37 | 0.0010 | 0.066 | 0.038 | 0.09 | 0.0037 |
Smoking statusc | ||||||||
Former smoker | 1.652 | 1.316 | 0.21 | 0.0020 | 1.753 | 1.947 | 0.37 | 0.0010 |
Current smoker | 2.416 | 2.494 | 0.33 | 0.0012 | 3.780 | 3.692 | 0.31 | 0.0013 |
Serum phosphorus | -3.815 | 1.169 | 0.001 | 0.0138 | -4.408 | 1.687 | 0.01 | 0.0086 |
Serum uric acid | 1.197 | 0.428 | 0.005 | 0.0101 | 1.173 | 0.619 | 0.06 | 0.0045 |
Serum calcium | -0.345 | 1.317 | 0.79 | 9E-05 | -- | -- | -- | |
Serum creatinine | -0.238 | 1.283 | 0.85 | 4E-05 | 0.337 | 1.895 | 0.86 | 4E-5 |
Total cholesterol | 0.019 | 0.014 | 0.18 | 0.0024 | -- | -- | -- | |
Total HDL | 0.061 | 0.042 | 0.14 | 0.0028 | 0.134 | 0.060 | 0.03 | 0.0062 |
Hematocrit | -0.188 | 0.166 | 0.26 | 0.0017 | -0.053 | 0.240 | 0.82 | 6E-5 |
Body mass index | 0.091 | 0.147 | 0.54 | 0.0005 | 0.315 | 0.214 | 0.14 | 0.0027 |
Systolic blood pressure | 0.077 | 0.037 | 0.04 | 0.0056 | -0.029 | 0.058 | 0.62 | 0.0003 |
Diastolic blood pressure | -0.062 | 0.069 | 0.37 | 0.0010 | -0.112 | 0.103 | 0.28 | 0.0015 |
Diagnosis of cancer | 1.306 | 1.359 | 0.34 | 0.0012 | -- | -- | -- | |
Diagnosis of diabetes | 4.493 | 2.188 | 0.04 | 0.0055 | 3.468 | 3.229 | 0.28 | 0.0015 |
Diagnosis of hypertension | -- | -- | -- | 4.737 | 1.794 | 0.01 | 0.0088 | |
AIC | 2703.5 | 3121.9 | ||||||
BIC | 2707.1 | 3125.2 | ||||||
R2 | 0.316 | 0.335 | ||||||
Adjusted R2 | 0.290 | 0.313 |
Partial R2 was calculated based on type II sum of squares.
Reference group is high school dropout.
Reference group is never smokers.