WIC MICA - Documentation/Metadata

Data for the WIC MICAs are acquired from the WIC Certification data set. The Special Supplemental Nutrition Program for Women, Infants and Children (WIC) is a U.S. Department of Agriculture program which was authorized by the U.S. Congress in 1972. WIC's main purposes are to provide food supplements, nutritional risk assessments, nutrition education, and health and social services referrals to pregnant and postpartum women, infants and children up to age five who have low- to moderate-income (less than 185 percent of the Federal Poverty Level). To find out more information on WIC go to: http://health.mo.gov/living/families/wic/.

The WIC MICAs analyze data from the WIC program in different ways than other reports developed by DHSS/WIC program. Because of these differences, numbers and percents found in various sources will not be the same.

Who is included in each WIC MICA?

How are WIC data collected?

System Conversion

Beginning in December 2008, the Missouri WIC Program converted from the HANDS software system to the MOWINS software system. MOPHIMS includes data from years 2009 and later collected from the MOWINS system. Due to differences in system structure, data for some indicators are no longer collected in MOWINS, while some additional data are collected that have allowed new indicators to be added to the WIC MICAs.

Following the conversion to the MOWINS software system, staff from several units within the Department of Health and Senior Services formed a WIC Data Group to review indicators published in the WIC MICAs, the Pregnancy Nutritional Surveillance System (PNSS), the Pediatric Nutrition Surveillance System (PedNSS), and other reports that utilize WIC data. This group made several suggestions for changes to existing indicators or addition of new indicators. These changes are detailed on each WIC MICA definitions page.

Because data are unavailable for some indicators during certain years, combined rates using those indicators/years are not valid. For example, in the table below, prior live birth data are unavailable for 2009. It would not be valid to state that the combined 2009-2010 rate for participants in the WIC prenatal program with no prior live births was 16.59%. The total for selection in the example below is based solely on 2010 data.


Missouri Resident WIC Prenatal Participants table image


MOHPIMS 2X2 Tables and Rate Interpretatio

Previous MICA systems restricted users to a single indicator per table. MOPHIMS has the capacity to cross indicators and generate 2x2 tables using the optional variable selections; however, this means that a user could potentially cross indicators that use two different denominators. This results in the problem of which denominator to use when calculating the rates in the table.

MOPHIMS designates the main column selection on the query page as the variable that determines the rate to be calculated. The following examples illustrate how the main column selection influences the rate calculation and interpretation by generating a table that crosses two optional variables: Smoking late pregnancy and Birth weight.

The first table was generated with the Smoking late pregnancy variable as the main column selection. Therefore, the rate was calculated using the Known late pregnancy smoking status as the denominator. The second table uses the Birth weight variable as the main column selection and Known birth weight as the denominator for rate calculations. (NOTE: For optional variables, rates for total selection use the total number of WIC participants for that specific MICA as the denominator).


Missouri Resident WIC Postpartum Participants table image


The interpretation of the rate in the upper left hand corner of the table would be:

Of the WIC mothers with known late pregnancy smoking status, 26.52% of those mothers who had a low birth weight baby smoked during the last three months of pregnancy.


Missouri Resident WIC Ppostpartum Participants table image


The interpretation of the rate in the upper left hand corner of the table would be:

12.04% of WIC mothers with known birth weight who smoked during the last three months of pregnancy had a low birth weight infant.