Vaccination status against rotavirus was evaluated for inclusion
in the model differently than other variables because
the anti-rotavirus vaccine was only introduced in the
Brazilian public health system in 2006 and, consequently,
children 4 to 5 years of age in the sample had not had the
opportunity to receive it during their first 6 months of
age. The National Immunization Program of the Brazilian
Ministry of Health stipulates that children receive the first
dose at two months and the second at four months. Thus,
diarrhea prevalence rates were compared for the subset of
children 6 to 24 months according to vaccination status