METHODS/DESIGN:
We will perform a cluster randomised, controlled, multicentre trial. Randomisation unit: Primary Care Team.
STUDY POPULATION:
898 pregnant women over the age of 17 years attending consultation to a midwife during the first trimester of pregnancy in the participating primary care centres.
OUTCOME MEASURES:
consumption of iodine-rich foods and iodine deficiency. Points of assessment: each trimester of the gestation.
INTERVENTION:
group education during the first trimester of gestation on healthy hygiene-dietetic habits and the importance of an adequate iodine nutritional status.
STATISTICAL ANALYSIS:
descriptive analysis of all variables will be performed as well as multilevel logistic regression. All analyses will be done carried out on an intention to treat basis and will be fitted for potential confounding factors and variables of clinical importance.
DISCUSSION:
Evidence of generalised iodine deficiency during pregnancy could lead to the promotion of interventions of prevention such as how to improve and intensify health care educational programmes for pregnant women.