| prevalence and implications of perinatal substance use in missouri. | a study was conducted to determine the prevalence of perinatal substance use in missouri. the population sample studied was selected according to a multi-stage probability-proportional-to-size sampling. the weighted prevalence for perinatal exposure to alcohol, tobacco or illicit substances was 31.9%, 10.8% for illicit substances, 21.9% for tobacco use, and 7.9% for self-reported alcohol use. in 1993, an estimated 23,925 perinatal exposures to licit and illicit substances occurred. | 1996 | 8763783 |