Tinidazole

Study	Type of data	Exposure measurement	Outcome assessment	Adjustment
Czeizel, 2003	case control	Exposure data obtained prospectively through antenatal care logbooks and other medical records, and retrospectively by questionnaires completed by mothers. Finally all non-respondent case and 200 non-respondent control families were visited at home by regional nurses to obtain necessary data.	Not specified.	Controls matched according to sex, week of birth, and district of parents’ residence. Adjusted PORs for potential confounders using conditional logistic regression model (NOS).