Results of the multiple regression analysis for exposed subjects only
| Group | Multiple regression method | Independent variable | β | p Value |
| Exposed only (n=11) | Standard | Age | 1.63 (0.61) | =0.03 |
| Years of residence | 0.88 (0.35) | =0.04 | ||
| Cumulative blood lead index | −1.46 (0.86) | =0.13 | ||
| Backward stepwise | Age | 0.93 (0.13) | <0.001 |