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Data Extent

WIC Infant and Toddler Feeding Practices Study-2 (WIC ITFPS-2)

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

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 who participate in WIC. This longitudinal cohort study has generated a series of reports.

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 2018.

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.

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 Second Year Report (https://www.fns.usda.gov/wic/wic-infant-and-toddler-feeding-practices-st...) for a detailed explanation 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
Modified
2022-11-09
Release Date
2022-11-09
Frequency
Not Planned
Identifier
0c0c069c-1515-4692-b1eb-9e4fce36b3f7
Spatial / Geographical Coverage Area
POLYGON ((-133.52508544922 24.678217668638, -133.52508544922 51.721073365494, -61.894226074219 51.721073365494, -61.894226074219 24.678217668638))
POINT (-99.335632324219 40.003423893179)
Publisher
USDA FNS Office of Policy Support
Spatial / Geographical Coverage Location
United States
Temporal Coverage
January 1, 2013
License
Contact Name
USDA FNS OPS
Contact Email
Public Access Level
Public
Program Code
005:040 - Department of Agriculture - National Research
Bureau Code
005:84 - Food and Nutrition Service