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Wilson-adjusted sample proportion to determine association between ALAD1-1, ALAD1-2 and blood lead levels. Though results are consistent with decreased blood lead levels among those with the ALAD-2 allele, the numbers are too small to produce a statistically significant association.
| BLL (µg/dL) | ALAD1-1 | ALAD1-2 | Wilson-Adjusted Sample Proportion |
|---|---|---|---|
| <3.3 µg/dL | 157 | 12 | 95% confidence interval (−0.3305, 0.03350) |
| >3.3 µg/dL | 61 | 1 | |
| Total | 218 | 13 |
