• Presentation

How Complicated Do You Want to Make It? Lessons Learned in Adapting an Existing RDD Survey Instrument


Twiddy, S. E., & Carley-Baxter, L. (2005, May). How Complicated Do You Want to Make It? Lessons Learned in Adapting an Existing RDD Survey Instrument. Presented at International Field Directors and Technologies Conference, Miami Beach, FL.


Projects frequently require adapting a previously used surveyinstrument for a new survey for many reasons including using similarstudy methodology, comparability across questions for differentstudies, using previously tested questions, and reducing the amount ofresources needed for survey design. This presentation focuses on thechallenges and lessons learned in adapting the National ImmunizationSurvey (NIS) for another childhood vaccination study (Accuracy ofParental Report of Hepatitis A Vaccination of Children, or HAV PEP).The NIS instrument was designed to collect immunization, demographic,and health care provider data from households with eligible childrenbetween the ages of nineteen and thirty-five months. The NIS and HAVPEP are random-digit-dial surveys that collect information aboutchildhood vaccinations from parents and providers. The HAV PEP studywas conducted in two states with high rates of Hepatitis A (Arizona andOregon) with a sample size of 2,500 households, while the NIS is anationwide survey with a sample size of 100,000 . Reducing the scope ofthe NIS survey and adapting its survey instrument for a new populationrequired dealing with several challenges. These included targeting adifferent age range of eligible children, revising the number and typeof vaccinations included, and adjusting skip patterns based on the newpopulation. There were additional problems in writing thespecifications for the HAV PEP survey. The nature of the data requiredcreating multiple possible scenarios that were very difficult toprogram. Owing to the complexity of many families these days, thesescenarios may be useful for other organizations collecting informationabout children.