Results of the multiple regression analysis for exposed and control subjects combined
| Group | Multiple regression method | Independent variable | β | p Value |
| Exposed and control combined (n=22) | Backward stepwise | Cumulative blood lead index | 0.94 (0.18) | <0.001 |
| Standard | Age | 0.09 (0.18) | =0.61 | |
| Years of residence5-150 | 0.17 (0.31) | =0.60 | ||
| Cumulative blood lead index | 0.74 (0.37) | =0.06 |
↵5-150 Regression of years of residence indexv bone lead failed tests of linearity.