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Change in longitudinal trend of blood lead level and ambient lead concentration in Korea
| ≤1992 |
≥1993 |
|||
|---|---|---|---|---|
| Correlation coefficient | p-value | Correlation coefficient | p-value | |
| Blood lead level (μg/dL) | 0.65 | <0.001 | -0.67 | <0.001 |
| Ambient air lead level (μg/m2) | NCa | -0.86 | <0.001 | |
NC, not calculated.
NC due to apparent curvilinear relationship between year and ambient lead level from 1985 to 1992 with a peak observed in 1989.
