The incidence rates and hazards ratios of congenital heart defects according to paternal age groups.

<p>^{Model 1}Adjustment for linear and quadratic terms of maternal age, parental age difference, gender of the child, parity, and calendar year of child birth; ^Model2Adjustment for Model 1+ family history of CHDs and maternal infection during pregnancy.</p><p>The incidence rates and hazards ratios of congenital heart defects according to paternal age groups.