Prepregnancy Risk Factors for Preterm Birth and the Role of Maternal Nativity in a Low-Income, Hispanic Population.

Objectives: The aim of this study was to assess potential prepregnancy risk factors for preterm birth in a low-income, Hispanic population in Southern California. Additionally, the study assessed whether the prevalence of preterm birth and any associations between risk factors and preterm birth differed between U.S.

The effectiveness of assessment and referral on immunization coverage in the special supplemental nutrition program for women, infants, and children.

Background: The use of immunization assessment and referral (A/R) in the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) has been shown to produce dramatic improvements in vaccination coverage when coupled with parental incentive; however, data are lacking to support the use of A/R alone.

Objective: To determine the effectiveness of A/R in increasing immunization coverage among WIC participants.

Design: Participating WIC centers were assigned to1 of 3 interventions that delivered A/R of varying frequency or a control group.