Trihalomethanes in drinking water and spontaneous abortion

被引:333
作者
Waller, K [1 ]
Swan, SH [1 ]
DeLorenze, G [1 ]
Hopkins, B [1 ]
机构
[1] Calif Dept Hlth Serv, Reprod Epidemiol Sect, Emeryville, CA 94608 USA
关键词
spontaneous abortion; trihalomethanes; drinking water; chloroform; bromoform; bromodichloromethane; chlorodibromomethane; chlorination disinfection byproducts;
D O I
10.1097/00001648-199803000-00006
中图分类号
R1 [预防医学、卫生学];
学科分类号
1004 ; 120402 ;
摘要
Trihalomethanes (chloroform, bromoform, bromodichloromethane, and chlorodibromomethane) are common contaminants of chlorinated drinking water. Although animal data indicate that these compounds may be reproductive toxicants, little information exists on their relation to spontaneous abortion in humans. We examined exposure to trihalomethanes and spontaneous abortion in a prospective study of 5,144 pregnant women in a prepaid health plan. Seventy-eight drinking water utilities provided concurrent trihalomethane sampling data. We calculated total trihalomethane levels by averaging all measurements taken by the subject's utility during her first trimester. We calculated exposures to individual trihalomethanes in an analogous manner. Women who drank greater than or equal to 5 glasses per day of cold tapwater containing greater than or equal to 75 mu g per liter total trihalomethanes had an adjusted odds ratio (OR) of 1.8 for spontaneous abortion [95% confidence interval (CI) = 1.1-3.0]. Of the four individual trihalomethanes, only high bromodichloromethane exposure (consumption of greater than or equal to 5 glasses per day of cold tapwater containing greater than or equal to 18 mu g per liter bromodichloromethane) was associated with spontaneous abortion both alone (adjusted OR = 3.0; 95% CI = 1.2-3.5) and after adjustment for the other trihalomethanes (adjusted OR = 3.0; 95% CI = 1.4-6.6).
引用
收藏
页码:134 / 140
页数:7
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