Table 1.
Comparison of mean blood lead levels by presence versus absence of potential sources and risk factors in school children from Alpuyeca, Mexico using T-test.
| Potential Sources or Risk Factors for Higher Blood Lead Levels (%) | Mean Blood Lead Level (µg/dL) | Mean Blood Lead Difference Comparing to Reference Group (µg/dL) | T-Test P(t) |
|---|---|---|---|
| Male sex (47) | 7.57 | 0.69 | 0.29 |
| Exposed to second-hand smoke at home (37) | 6.82 | −0.69 | 0.31 |
| Food is cooked in lead glazed ceramics at home (48) | 7.98 | 1.4 | 0.03 |
| Food is stored in lead glazed ceramics at home (12) | 9.29 | 2.39 | 0.02 |
| Eats potentially lead-contaminated candies (84) | 7.29 | 0.38 | 0.66 |
| Pica (soil, paint, pencils or chalk) (55) | 7.23 | 0.01 | 0.99 |
| No flooring within the house (bare soil) (26) | 8.00 | 1.04 | 0.16 |
| Painted walls in the house (47) | 6.55 | −1.34 | 0.05 |
| No tap water available in the house (53) | 7.06 | −0.4 | 0.55 |
| Home located in poorest neighborhoods (53) | 7.28 | 0.11 | 0.87 |
| Attends afternoon school shift (56) | 7.65 | 1.55 | 0.28 |
| Possible para-occupational exposure to lead (18) | 7.02 | −0.26 | 0.76 |