To identify characteristics associated with undergoing cell-free DNA (cfDNA) and multiple marker screening (MMS) simultaneously or redundantly (after receiving negative results from the first screening test) among women aged ≥ 35 years.STUDY DESIGN:
Participants presenting for prenatal testing completed a questionnaire that included measures of pregnancy worry and attitudes toward potential testing outcomes; data on prenatal test use was obtained via medical record review. We used multivariable logistic regression to identify factors associated with redundant or simultaneous screening.RESULTS:
Among 164 participants, 69 (42.1%) had cfDNA redundantly (n = 51) to, or simultaneously (n = 18) with, MMS. Compared with the 46 MMS-negative women who did not undergo further testing, those who underwent redundant or simultaneous cfDNA/MMS screening were more likely to have annual family incomes > $150 000, to feel having a miscarriage would be worse than having an intellectually disabled child, to desire comprehensive testing for intellectual disability and to have more pregnancy worry.CONCLUSION:
Providers who counsel patients on prenatal aneuploidy screening tests should explain the appropriate utilization of these screening tests to avoid unnecessary or minimally informative use of multiple tests.