Table 1 Probabilities of the events used in the simulations [8]
From: Fetal Down syndrome screening models for developing countries; Part II: Cost-benefit analysis
Variables | Distri-bution | Mean |
|---|---|---|
 Prevalence of women attending antenatal care in the first trimester | normal | 0.7080 |
 Prevalence of DS at 16 weeks of gestation in women of < 35 years of age | beta | 0.0016 |
 Prevalence of DS at 16 weeks of gestation in women of ≥ 35 years of age | beta | 0.0057 |
 Prevalence of DS at 16 weeks of gestation in women of all age | beta | 0.0018 |
Prevalence of DS in women of all age | beta | 0.0018 |
 MSS uptake among women of all age | beta | 0.9557 |
 Amniocetesis uptake among women of all age | beta | 0.9245 |
 Spontaneous abortion of DS fetuses at 10 weeks of gestation in women of all age | beta | 0.2713 |
 Spontaneous abortion of DS fetuses at 16 weeks of gestation in women of all ages | beta | 0.2175 |
Spontaneous abortion of DS fetuses in women of all age | beta | 0.2920 |
 Termination of pregnancy in case of +ve amniocentesis | normal | 0.9500 |
 Amniocentesis-related fetal loss | beta | 0.0050 |
 NIPS uptake (assumption for free of charge) | beta | 0.9900 |