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Previous Volume 329:850-854 September 16, 1993 Number 12 Next

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ABSTRACT

Background Perinatal substance exposure has been linked to many neonatal and obstetrical complications. There have been few population-based epidemiologic studies to identify the prevalence and demographic profiles associated with drugs, alcohol, and smoking during pregnancy.

Methods We studied a population sample selected according to a multistage probability sampling design to estimate the prevalence of perinatal substance exposures in California in 1992. Urine samples from 29,494 women presenting for delivery in 202 hospitals were coded and screened for toxins; the results of toxicology screening were later linked by code number to the subjects' demographic variables and their reported use of tobacco and prescribed drugs. Urinary toxicologic tests provide conservative estimates because they can detect only very recent substance use.

Results The weighted prevalence for perinatal substance exposure was 5.16 percent for the use of one or more drugs, 6.72 percent for alcohol (analyzed independently), and 8.82 percent for self-reported smoking. The percentage of women testing positive for any drug, including alcohol, was 11.35 percent. Estimates for racial and ethnic groups varied widely. Black women had the highest prevalence of total drug use (14.22 percent), alcohol use (11.58 percent), cocaine use (7.79 percent), and tobacco use (20.12 percent). Most drug exposures occurred among white non-Hispanic and Hispanic women. White non-Hispanic women had the second highest prevalence rate for the use of one or more drugs (6.79 percent) and self-reported tobacco use (14.82 percent). Hispanic women had the second highest prevalence rate for alcohol (6.87 percent).

Conclusions In California in 1992, there were 67,361 estimated perinatal exposures to one or more drugs, including alcohol, and 52,346 self-reported exposures to tobacco. These findings have clinical and public health implications.

Source Information

From the University of California, Berkeley (W.A.V.); San Diego State University, San Diego (B.K.); California State University, San Bernardino (J.H.); and the Western Consortium for Public Health, Berkeley (A.N.) -- all in California.

Address reprint requests to Professor Vega at the School of Public Health, Center for Community Health, Warren Hall, University of California, Berkeley, CA 94720.

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