We examined low-birthweight (LBW) rates among participants in Colorado's Prenatal Plus program by prenatal risk factors (smoking, inadequate weight gain during pregnancy, and psychosocial problems) and the effect of successful resolution of these risks during pregnancy. Data for 3569 Medicaid-eligible women who received care coordination, nutritional counseling, or psychosocial counseling through the Prenatal Plus Program in 2002 were analyzed to determine the prevalence of specific risks, the proportion of women who resolved each specific risk, and the low birthweight rates for births to women who did and did not resolve risk. LBW rates were analyzed with chi(2) tests of significance. Women who quit smoking had an LBW rate of 8.5%, compared with an LBW rate of 13.7% among women who did not. Women with adequate weight gain had an LBW rate of 6.7%, compared with 17.2% among women with inadequate weight gain. Women who resolved all of their risks had a low-birthweight rate of 7.0%, compared with a rate of 13.2% among women who resolved no risks. Women who had at least 10 Prenatal Plus visits were more likely to resolve their risks than were women who had fewer visits. Multidisciplinary prenatal interventions targeted toward specific risks demonstrate success at significantly improving infant birthweight.
