Maternal Blood, Plasma, and Breast Milk Lead: Lactational Transfer and Contribution to Infant Exposure

http://dx.doi.org/10.1289/ehp.1307187



Table 2. Correlation matrixa for mother–infant lead biomarkers, Mexico City, 1997–1999.
Biomarker of lead exposure Breast milkb Bloodb Plasmab Bloodc
aSpearman correlation coefficients (ρ); prob > |r| under H0: ρ = 0. bMaternal: sample collected 1 month postpartum, n = 81. cInfant blood: sample collected at 3 months of age, n = 60. *p < 0.0001. **p < 0.01.
Maternal        
Breast milk 1.00 0.44* 0.31** 0.34**
Blood   1.00 0.76* 0.65*
Plasma     1.00 0.44**
Infant blood       1.00