The study did not collect data from any southern states or from homeschooled children, where religion may play more of a role in parents deciding not to vaccinate. Nonresponse bias may have resulted in more conservative odds ratios associated with distrustful parents’ beliefs and behaviors, ...
Understanding trends in vaccine refusal is critical to monitor as small declines in vaccination coverage can lead to outbreaks of vaccine-preventable diseases. Using electronic heath record (EHR) data from the Children’s Hospital of Philadelphia’s 31 outpatient primary care sites, we created a coho...