About half of US kids younger than 2 years old do not receive all vaccines as recommended by a federal schedule, according to a study yesterday in JAMA Pediatrics. Of 323,247 children born from 2004 to 2008, Kaiser Permanente researchers found that 157,454 (48.7%) missed their scheduled childhood vaccines by at least a day, and one in eight of those kids' parents intentionally strayed from the schedule recommended by the US Advisory Committee on Immunization Practices."
JAMA Network | JAMA Pediatrics | A Population-Based Cohort Study of Undervaccination in 8 Managed Ca, archpedi.jamanetwork.com
Objectives: To examine patterns and trends of undervaccination in children aged 2 to 24 months and to compare health care utilization rates between undervaccinated and age-appropriately vaccinated children.
Results: Of 323 247 children born between 2004 and 2008, 48.7% were for at least 1 day before age 24 months. The prevalence of undervaccination and specific patterns of undervaccination increased over time (P < .001). In a matched cohort analysis, undervaccinated children had lower outpatient visit rates compared with children who were age-appropriately vaccinated (incidence rate ratio [IRR], 0.89; 95% CI, 0.89- 0.90). In contrast, undervaccinated children had increased inpatient admission rates compared with age-appropriately vaccinated children (IRR, 1.21; 95% CI, 1.18-1.23). In a second matched cohort analysis, children who were undervaccinated because of parental choice had lower rates of outpatient visits (IRR, 0.94; 95% CI, 0.93-0.95) and emergency department encounters (IRR, 0.91; 95% CI, 0.88-0.94) than age-appropriately vaccinated children.
Conclusions: Undervaccination appears to be an increasing trend. Undervaccinated children appear to have different health care utilization patterns compared with age-appropriately vaccinated children.
http://archpedi.jamanetwork.com/article.aspx?articleid=1558057#qundefined
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