Table 1

Number and proportion (%) of mothers and fathers included in the analysis of periconceptual exposure

Cases (n = 3838)Controls (n = 7629)Cases (n = 3838)Controls (n = 7629)
*For each child enrolled in the study up to four parents (biological and non-biological) were interviewed.
†Parents without a job history are included in the analysis as “not exposed”; non-natural parents are excluded.
Parental interviews*3866100765710037911007308100
Non-natural parent481.2570.71955.12984.1
Included in analysis†381898.8760099.3359694.9701095.9
Reported job at periconception209154.1430656.2308881.5598081.8