In this post, when we will continue our analysis on vaccinated and unvaccinated patient populations.
There was some variation over time within the mother’s age group, but on average the mothers of unvaccinated children were between the ages of 20-29 in 53% of cases, 43% were older than 30, and 3% were under 19 years of age. Mothers of vaccinated children who were less than 19 years of age were similar to the unvaccinated group and were 3% of the vaccinated group. The vaccinated group differed from the unvaccinated group in mother age groups 20-29 at 43% and older than 30 years of age at 54%. We also saw that there was little change over time in the marital status of the mother. In unvaccinated cases on average, 65% of mothers are married and in vaccinated cases 71% are married. In unvaccinated cases, on average 35% of mothers were never married, widowed, divorced, separated, or deceased and in vaccinated cases its 29%.
Among mothers of unvaccinated children, mothers who had 12 years of education or less accounted for a greater percentage than those that had greater than 12 years of education. However, the trend also shows that over time, the gap between education levels has decreased in the percent of unvaccinated children.
The education levels of mothers in the vaccinated children group are on average 52% with 12 years or less and 48% with greater than 12 years of education. The difference between the two education groups in not as much in vaccinated cases as it is in unvaccinated cases. The trend also shows that the percent of case where the mothers has 12 years of education or less has been steadily decreasing over time and the percent of cases where mothers have greater than 12 years of education has been slowly increasing over time as you can see in Figure 4 below.
Another interesting aspect of the VFC is that the vaccines are acquired by providers from state health departments. As a result, it is important to look at the medical providers that participate in the VFC program and receive these discounted vaccines. The following graph shows that the providers participating in the VFC program have been decreasing over time in unvaccinated cases.
In vaccinated cases we see that there is a more constant percent of participation by child’s providers in the VFC program. On average 70% of vaccinated children’s providers participated in the program.
The overall percent change in total unvaccinated and vaccinated cases can be seen in Table 3 below. There were significant decreases in 1998, 2005, 2008 and 2011 in the percent change of unvaccinated cases. There were also increases in the percent change of unvaccinated cases in 2002, 2007, and 2009. Compared to the percent change in vaccinated cases, unvaccinated cases have more variance. The most distinct percent changes in vaccinated cases were in 1996, 2005, and 2006.
There are a few characteristics that stand out. We saw that there are more cases of children that are not first born and a little more than half that are male in both vaccinated and unvaccinated children. The characteristics of mothers of unvaccinated children were that they are married, have a high school diploma or less, and are 20-29 years of age. In vaccinated cases there was not as big of a difference in education levels of the mother but more than half had 12 or more years of education.
There were significantly more cases of vaccinated children with mothers who are married and mothers who are greater than 30 years of age. We also saw that the provider’s participation in the program also affected the unvaccinated population. There has been a decreasing trend in provider participation in the VFC program which could contribute to unvaccinated cases where as in vaccinated cases there has been a slow increase in cases of children’s providers participating in the VFC program.