Association between iron deficiency and low-level lead poisoning in an urban primary care clinic.
R O Wright,
M W Shannon,
R J Wright and
H Hu
Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Mass. 02115, USA. robert.wright@channing.harvard.edu
OBJECTIVES: The purpose of this study was to examine the associationbetween iron deficiency and low-level lead poisoning. METHODS:Data were collected in an urban primary care clinic from 3650children aged 9 to 48 months. Iron deficiency was defined asa red cell mean corpuscular volume (MCV) of less than 70 fLand a red cell distribution width (RDW) of more than 14.5 inchildren younger than 2 years, and an MCV of less than 73 fLand RDW of more than 14.5 in those 2 years or older. RESULTS:After adjustment for age, hemoglobin concentration, and insurancestatus, the odds ratios for iron deficiency predicting bloodlead levels greater than or equal to 5 micrograms/dL and greaterthan or equal to 10 micrograms/dL were 1.63 (95% confidenceinterval [CI] = 1.29, 2.04) and 1.44 (95% CI = 1.004, 2.05).CONCLUSIONS: Iron deficiency is significantly associated withlow-level lead poisoning in children aged 9 to 48 months.
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