highly significantP < 0.0001
We observed a highly significant nonlinear association of urinary 8-oxoGuo with serum ferritin ( P < 0.0001) and higher 8-oxoGuo concentrations for respirable iron >1,000 μg/m 3 compared to ≤57 μg/m 3 .
We observed a highly significant nonlinear association of urinary 8-oxoGuo with serum ferritin ( P < 0.0001) and higher 8-oxoGuo concentrations for respirable iron >1,000 μg/m 3 compared to ≤57 μg/m 3 .