Records of refusals or lack of availability were not kept in all sites.
Children without vaccine record because of refusal of immunization were included in the sample as nonvaccinated.
If a driver accepts an e-hail and then decides to refuse someone based on destination, race or physical disability, the record of that refusal is digitally stored.
We have no way of knowing how representative participants were of the general village community, and have no record of the refusal rate of those they asked to participate.
Records were kept of refusals, ineligible households, and lack of availability after two attempts.
From children and parents who finally refuse to participate in the study gender, age, weight status and reason of refusal are recorded.
We did not record the number of refusals, but anecdotal information suggestions this was 10 20% of the patients who were invited.
Researchers will explain the need of audio recording the interviews and the possibility of refusal if they do not agree with this procedure.
For the purposes of this analysis the number of participants was reduced due to factors such as no access to patient records, refusal of controls, insufficient English skills, or moved address.
A child was classified as a refuser if he/she had a record of a vaccine refusal either in the medical chart or in the immunization registry.
