Parental Refusal of Varicella Vaccination and the Associated Risk of Varicella Infection in Children
Open Access
- 1 January 2010
- journal article
- research article
- Published by American Medical Association (AMA) in Archives of Pediatrics & Adolescent Medicine
- Vol. 164 (1), 66-70
- https://doi.org/10.1001/archpediatrics.2009.244
Abstract
Objective To quantify both the individual-level and attributable risk of varicella infection requiring medical care in children whose parents refuse varicella immunizations. Design Matched case-control study with conditional logistic regression analysis. Setting Kaiser Permanente of Colorado (KPCO) health plan between 1998 and 2008. Participants Each pediatric physician-diagnosed case of varicella (n = 133) was matched to 4 randomly selected controls (n = 493). Cases were matched by age, sex, and length of enrollment in KPCO. Main Exposures Varicella vaccine refusal. Outcome Measures Varicella infection. Results There were 7 varicella vaccine refusers (5%) among the cases and 3 (0.6%) among the controls. Children of parents who refused varicella immunizations were at a greatly increased risk of varicella infection requiring medical care (odds ratio, 8.6; 95% confidence interval, 2.2-33.3) compared with children of parents who accepted vaccinations (P = .004). In the entire KPCO pediatric population, 5% of varicella cases were attributed to parental vaccine refusal. Conclusions Children of parents who refuse varicella immunizations are at high risk of varicella infection relative to vaccinated children. These results will be helpful to health care providers and parents when making decisions about immunizing children.Keywords
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