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- W2934014080 abstract "Analysis of cell-free DNA (cfDNA) from maternal blood has showed a great potential as a screening method for fetal aneuploidies. cfDNA can be used as a first line screening tool or in a contingent model, after the combined test. Prospective study of women attending for first trimester combined screening in our Hospital, in the first year of contingent cfDNA screening. According to the combined screening test result patients were divided in high-risk (offered invasive test or routine follow-up), intermediate-risk (counselled for cfDNA, invasive or routine follow-up) or low-risk (routine ultrasound follow-up). Pregnancy outcomes and performance of screening were evaluated. A cost-effectiveness analysis was also done. The majority of the 1272 enrolled participants were Caucasian (82,6%), multiparous (51,7%) and the median maternal age was 30 years old. Thirty women screened high-risk and 83,3% of them opted for an invasive test. Forty-nine patients had an intermediate risk and 75,5% of them choose cfDNA testing. Our rate of invasive tests decreased from 3.5% to 2.4%. The cut-offs used to determine high and intermediate-risk are based on a compromise between detection rate, pregnancy lost rate and cost. Above a determined cut-off in the intermediate-risk group, the cost for each additional detected trisomy case is very high. One major benefit of this contingent model was the decrease in invasive testing. The contingent cfDNA screening model can be easily implemented in a public hospital with a low-risk population. Since cost/benefit is an important issue, further studies are needed to determine the ideal cut-off for our country." @default.
- W2934014080 created "2019-04-11" @default.
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- W2934014080 date "2019-09-01" @default.
- W2934014080 modified "2023-10-14" @default.
- W2934014080 title "Cell-free DNA and contingent screening: Our first year" @default.
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- W2934014080 doi "https://doi.org/10.1016/j.jogoh.2019.04.001" @default.
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