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Cost Benefit Analysis of Prenatal Screening Test with Thai NIPT (Thai Non- Invasive Prenatal Test) for Down Syndrome in Developing Countries

Oraluck P, Boonsong O, Wasun C, Ammarin T and Panyu P

Objective: The purpose of this study was to assess cost benefits of prenatal screening test for Down syndrome in developing countries (like Thailand) in order to inform OB/GYN clinical practice and medical/public health policy). Methods: A decision tree model was developed to analyze cost-benefits of the two screening modalities versus conventional screening test as base case. The first screening modality was universal Thai NIPT (Thai Non-invasive Prenatal Test) and the second was contingent Thai NIPT. Input parameters related to clinical values and costs were obtained from both primary and secondary sources for Thai population. One-way analysis and probabilistic sensitivity analysis were performed to evaluate uncertainty surrounding model parameters. Results: Based on the societal perspective, performing universal Thai NIPT and contingent Thai NIPT yielded differences of incremental benefit to incremental cost of -4,472 to -3,784 Thai Baht (-127.77 to -108.11 US$) and 396 to 1,085 (11.31 to 31.00 US$) when each was compared to conventional tests. The ratio of incremental benefit to incremental cost was 0.03 to 0.14 for universal Thai NIPT, respectively and thus cost was saved for contingent Thai NIPT. Conclusion: Applying Thai NIPT as the first line of screening for Down syndrome might be cost beneficial if the price was around 4,047 to 4,795 Thai Baht or US$ 115.63 to 137.00 per test. The contingent Down syndrome screening tests by offering the conventional tests first, then followed by Thai NIPT before performing the invasive screening test which seems to be a cost beneficial alternative approach.