Figure 4.

Prenatal WIC Food Receipt by Number Months Before/After Conception When At Least One WIC Clinic Was Operating in the Mother’s ZIP Code of Residence: TX Births 2005–2009

Notes: The sample of analysis consists of all singleton births in Texas over 2005–2009 with mothers who reside in Texas. The sample is limited to conceptions in a 36-month period surrounding the time that each ZIP code experienced a first WIC clinic opening or a last WIC clinic closing. Mothers residing in ZIP codes that have experienced a first WIC clinic opening and a last WIC clinic closing within the same 36-month period are dropped (5 ZIP codes). To combine these openings and closings on the same graph, for conceptions in ZIP codes that experience a first WIC clinic opening, the x-axis variable is equal to “year-month of the first WIC clinic opening – conception year-month”, while for conceptions in ZIP codes that experience a last WIC clinic closing, the x-axis variable is equal to “conception year-month – year-month of last WIC clinic closing + 9”. Consequently, all x-axis values below 0 correspond to conceptions in ZIP codes with at least one WIC clinic operating during the entire pregnancy; x-axis values between 0 and 9 correspond to conceptions in ZIP codes where a WIC clinic opened or closed during pregnancy; and x-axis values above 9 correspond to conceptions in ZIP codes with no WIC clinics operating during pregnancy. The horizontal lines depict the mean values of WIC food benefit receipt for each group of observations. Please refer to the text in Section 5.2 for more details.