Blood lead level, by year and season, among poor pregnant women.

From: Archives of Environmental Health | Date: July 1, 1997| Author: Schell, Lawrence M.; Stark, Alice D.; Gomez, Marta I.; Grattan, William A. | Copyright information

ABSTRACT. The authors conducted a longtitudinal study of poor pregnant women and their infants to examine the determinants of maternal and infant lead levels. To accurately depict these determinants, one must account for secular and seasonal variations in these levels. The women's lead levels declined over the 5-y period of study by approximately 20%/y, depending on when in the course of pregnancy measurements were made. After correction for secular trend, we found a periodic effect that diff...

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