Table 3.

Detection Rate for a 5% False-Positive Rate With Standard Screening Policies and With Risk Modified by Genetic Sonogram Result

Policy	Standard	After Sonogram
Combined	81	90*
Quadruple	81	90
Integrated	93	98
Stepwise	97	98
Contingent	95	97
Stepwise sonogram†	—	90
Contingent sonogram†	—	90

Data are %.

^*Not interpreting the test until the sonogram is complete.

^†Replacing the second-stage quadruple markers with the sonogram.