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Data Extent

WIC Infant and Toddler Feeding Practices Study-2 (WIC ITFPS-2): Prenatal, Infant Year 5 Year Datasets

WIC Infant and Toddler  Feeding Practices Study-2:  Fifth Year Data

The WIC Infant and Toddler Feeding Practices Study–2 (WIC ITFPS-2) (also known as the “Feeding My Baby Study”) is a national, longitudinal study that captures data on caregivers and their children who participated in the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) around the time of the child’s birth. The study addresses a series of research questions regarding feeding practices, the effect of WIC services on those practices, and the health and nutrition outcomes of children on WIC. Additionally, the study assesses changes in behaviors and trends that may have occurred over the past 20 years by comparing findings to the WIC Infant Feeding Practices Study–1 (WIC IFPS-1), the last major study of the diets of infants on WIC. This longitudinal cohort study has generated a series of reports. These datasets include data from caregivers and their children during the prenatal period and during the children’s first five years of life (child ages 1 to 60 months).

A full description of the study design and data collection methods can be found in Chapter 1 of the Second Year Report (https://www.fns.usda.gov/wic/wic-infant-and-toddler-feeding-practices-st...). A full description of the sampling and weighting procedures can be found in Appendix B-1 of the Fourth Year Report (https://fns-prod.azureedge.net/sites/default/files/resource-files/WIC-IT...).

Processing methods and equipment used
Data in this dataset were primarily collected via telephone interview with caregivers. Children’s length/height and weight data were objectively collected while at the WIC clinic or during visits with healthcare providers. The study team cleaned the raw data to ensure the data were as correct, complete, and consistent as possible.

Study date(s) and duration
Data collection occurred between 2013 and 2019.
Study spatial scale (size of replicates and spatial scale of study area)
Respondents were primarily the caregivers of children who received WIC services around the time of the child’s birth. Data were collected from 80 WIC sites across 27 State agencies.

Level of true replication
Unknown

Sampling precision (within-replicate sampling or pseudoreplication)
This dataset includes sampling weights that can be applied to produce national estimates. A full description of the sampling and weighting procedures can be found in Appendix B-1 of the Fourth Year Report (https://fns-prod.azureedge.net/sites/default/files/resource-files/WIC-IT...).
Level of subsampling (number and repeat or within-replicate sampling)

A full description of the sampling and weighting procedures can be found in Appendix B-1 of the Fourth Year Report (https://fns-prod.azureedge.net/sites/default/files/resource-files/WIC-IT...).

Study design (before–after, control–impacts, time series, before–after-control–impacts)
Longitudinal cohort study.

Description of any data manipulation, modeling, or statistical analysis undertaken
Each entry in the dataset contains caregiver-level responses to telephone interviews. Also available in the dataset are children’s length/height and weight data, which were objectively collected while at the WIC clinic or during visits with healthcare providers. In addition, the file contains derived variables used for analytic purposes. The file also includes weights created to produce national estimates.
The dataset does not include any personally-identifiable information for the study children and/or for individuals who completed the telephone interviews.

Description of any gaps in the data or other limiting factors
Please refer to the series of annual WIC ITFPS-2 reports (https://www.fns.usda.gov/wic/infant-and-toddler-feeding-practices-study-...) for detailed explanations of the study’s limitations.

Outcome measurement methods and equipment used
The majority of outcomes were measured via telephone interviews with children’s caregivers. Dietary intake was assessed using the USDA Automated Multiple Pass Method (https://www.ars.usda.gov/northeast-area/beltsville-md-bhnrc/beltsville-h...). Children’s length/height and weight data were objectively collected while at the WIC clinic or during visits with healthcare providers.

FieldValue
Tags
Parent Record
Modified
2023-05-04
Release Date
2022-11-10
Identifier
5ba18590-cc60-4da7-9be0-df0ee553a26f
Spatial / Geographical Coverage Area
POLYGON ((-130.66162347794 23.2817191756, -130.66162347794 51.255804989, -65.036594867706 51.255804989, -65.036594867706 23.2817191756))
POLYGON ((-172.06787109375 52.22331731689, -172.06787109375 72.242962523344, -137.69287347794 72.242962523344, -137.69287347794 52.22331731689))
POLYGON ((-161.13035917282 13.662584394355, -161.13035917282 25.063481365232, -149.41161632538 25.063481365232, -149.41161632538 13.662584394355))
Publisher
USDA FNS Office of Policy Support
Spatial / Geographical Coverage Location
United States
Temporal Coverage
July 1, 2021 to August 30, 2022
License
Contact Name
USDA FNS Office of Policy Support
Contact Email
Public Access Level
Public
Program Code
005:040 - Department of Agriculture - National Research
Bureau Code
005:84 - Food and Nutrition Service