Accuracy and Usefulness of the HEDIS Childhood Immunization Measures
Bundy DG et al. – Healthcare Effectiveness Data and Information Set (HEDIS) childhood immunization measures are, on the whole, accurate and useful. Certain immunizations (eg, hepatitis B, pneumococcal conjugate) and children (eg, those with a single overdue immunization), however, are more prone to HEDIS misclassification.
For children aged 24 to 35 months from the 2009 National Immunization Survey, they assessed the accuracy and usefulness of the HEDIS childhood immunization measures for 6 individual immunizations and a composite.
A total of 12096 children met all inclusion criteria and composed the study sample.
The HEDIS measures had >90% accuracy when compared with the CDC gold standard for each of the 6 immunizations (range, 94.3%–99.7%) and the composite (93.8%).
The HEDIS measure was least accurate for hepatitis B and pneumococcal conjugate immunizations.
The proportion of children for which the HEDIS measure yielded a nonuseful result (ie, an incorrect answer to the question, “is this child due for catch-up immunization”) ranged from 0.33% (varicella) to 5.96% (pneumococcal conjugate).
The most important predictor of HEDIS measure accuracy and usefulness was the CDC-recommended number of immunizations due at age 2 years; children with zero or all immunizations due were the most likely to be correctly classified.
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