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Resource | Research and Data | Assessing/Improving Operations WIC Participant and Program Characteristics 2010

WIC Participant and Program Characteristics summarizes the demographic characteristics of nationwide participants in April 2010. It includes information on participant income and nutrition risk characteristics, estimates breastfeeding initiation rates for WIC infants, and describes WIC members of migrant farm-worker families.

12/01/2011
Resource | Research and Data | Food/Nutrient Analysis WIC Food Packages Policy Options

This study describes some of the choices state agencies made as they exercised the flexibility offered during the implementation and describes the resulting food packages.

06/01/2011
Resource | Research and Data | Breastfeeding Breastfeeding Intervention Design Study

While a great deal of breastfeeding promotion and support is happening in WIC at both the state and local levels, there has been no systematic effort to evaluate what might work best in the WIC setting. Within this context, FNS  contracted for a breastfeeding intervention design study with the following goals: Identify interventions to increase the incidence, duration and intensity of breastfeeding among women participating in WIC; and design an evaluation plan to examine the implementation and effectiveness of these interventions.

08/30/2004
Resource | Research and Data | Food/Nutrient Analysis Proposed Criteria for Selecting the WIC Food Packages

This report is the first step in the developing recommendations for revision to the WIC food packages. It reviews the nutritional needs and assesses the dietary adequacy of the WIC target population and proposes priority nutrients and food groups and general nutrition recommendations for the WIC food packages. This is a report of the National Academies' Institute of Medicine (Food and Nutrition Board), published here by permission. It is also available on the Institute of Medicine website.

08/01/2004
Resource | Research and Data | Participation Characteristics National Survey of WIC Participants

Since 1992, FNS has produced biennial reports on WIC participant and program characteristics based on the WIC Minimum Data Set compiled from state management information systems. The 20 items included in the MDS are collected as part of ongoing WIC operations and consist primarily of in formation related to participant eligibility.

10/01/2001
Resource | Research and Data | Demonstrations Framework for Dietary Risk Assessment in the WIC Program

This is a report of the National Academies' Institute of Medicine (Food and Nutrition Board), published here by permission.

10/01/2001
Resource | Research and Data | Participation Characteristics Prevalence of Overweight Among WIC Children

This study examines the trends in the prevalence of overweight among WIC children during the 1990s. The study is based on data collected by the biennial WIC Participant and Program Characteristics Studies (1992, 1994, 1996 and 1998). 

07/01/2001
Resource | Research and Data | Payment Accuracy and Program Integrity WIC Vendor Management Study - 1998

The purpose of the study was to learn the extent to which retail grocers, defined as "vendors" in the WIC Program, authorized to provide food to WIC participants, were violating program rules and procedures, and to determine which programmatic and/or demographic variables could be associated with vendor violations.

07/01/2001
Resource | Report to Congress Food Assistance: Research Provides Limited Information on the Effectiveness of Specific WIC Nutrition Services

This report (1) identifies the number and nature of recent studies that have examined the effectiveness of three WIC services—nutrition education, breastfeeding promotion and support, and referral services—and (2) summarizes what the research shows about the effectiveness of these specific nutrition services. 

03/01/2001
Resource | Research and Data | Demonstrations WIC Nutrition Education Demonstration Study: Child Intervention

In 1994, FNS initiated the WIC Nutrition Education Demonstration Study. The demonstration had two components: a comparison of the effects of innovative and traditional WIC nutrition education for prenatal participants; and a study of the feasibility and effectiveness of providing nutrition education to preschool (three-and-four-year-old) WIC participants. The report summarized here describes the design and implementation of the child nutrition education demonstration and presents findings describing the effectiveness of the demonstration.

03/01/2001
Page updated: September 16, 2025