Clonidine (versus unexposed)

Study	Type of data	Exposure measurement	Outcome assessment	Adjustment
Huisjes, 1986	retrospective cohort	Not specified.	All children were examined neurologically according to the standardized and age-specific technique described by Touwen at ages varying from 3 to 9.5 years. A comprehensive questionnaire on sleeping behaviour, derived from a study by Cohen-Matthijsen, was sent to all parents.	Control group matched for diastolic blood pressure during pregnancy, and sex, birthweight and gestational age of the children.