Analysis of health outcomes in vaccinated and unvaccinated children: Developmental delays, asthma, ear infections and gastrointestinal disorders
This observational study compared health outcomes in a convenience sample of vaccinated and unvaccinated children from three pediatric practices. It found that vaccination before one year of age was associated with increased odds of developmental delays, asthma, and ear infections, but could only calculate unadjusted observational associations, not causal relationships, and did not control for many confounding factors. The sample selection and lack of demographic data severely limit the generalizability and reliability of these correlations.