Figure 1.
Overview of the linkage and cohort identification process; Medicaid Analytic eXtract, 2000–2007.
Figure 2.
Hypothetical example of woman-infant linkage by state, Case Number, and delivery date range/date of birth.
CA, California.
Figure 3.
Schematic of the primary eligibility period.
Table 1.
The number of deliveries before linkage and the percentage of deliveries that linked to an infant, and the number of child MSIS_ID and date of birth combinations before linkage and the percentage of combinations that linked to a delivery listed by inpatient and outpatient linkage and by state; Medicaid Analytic eXtract, 2000–2007.
Figure 4.
Cohort size by eligibility period; Medicaid Analytic eXtract, 2000–2007.
The number of pregnancies in the base cohort (eligible from at least 1 month before the LMP month until the month after the delivery month) is represented in red and the number of pregnancies when additional or fewer months of eligibility are required is represented in blue. The lengths of the eligibility periods decrease when moving away from the vertical axis along the horizontal axis. – indicates the number of months before the LMP and+indicates the number of months after the LMP at which the eligibility period begins, and all eligibility periods continue until the month after the delivery month. LMP, last menstrual period; M, months.
Figure 5.
Number of pregnancies contributed to the base cohort by state; Medicaid Analytic eXtract, 2000–2007.
Figure 6.
The distribution of maternal characteristics in the base cohort; Medicaid Analytic eXtract, 2000–2007.
A) Age, B) Race, C) Medicaid Eligibility Group, and D) Delivery Year.