Table 4 Knowledge test - respondents were asked to choose if each statement was true, false or if they were unsure
Knowledge test statement | Correct answer | Pre-training results | 1-month follow-up after training results | ||
|---|---|---|---|---|---|
| Â | Â | Correct | Incorrect/unsure | Correct | Incorrect/unsure |
Cell free fetal DNA originates from cells in the placenta | True | 37 (25.3%) | 109 (74.7%) | 88 (63.8%) | 50 (36.2%) |
The concentration of cell free fetal DNA decreases with gestation | False | 23 (15.6%) | 124 (84.4%) | 88 (42%) | 80 (58%) |
NIPT measures chromosome levels to identify elevated levels of chromosome 21, 18 and 13 | True | 57 (38.5%) | 91 (61.5%) | 113 (81.9%) | 25 (18.1%) |
NIPT for Down’s syndrome is over 99% accurate | True | 72 (48.6%) | 76 (51.4%) | 98 (71%) | 40 (29%) |
The false positive rate for NIPT for Down’s syndrome is 10% | False | 28 (19%) | 119 (81%) | 88 (63.8%) | 50 (36.2%) |
The turnaround time for the NIPT test is three weeks | False | 25 (16.9%) | 123 (83.1%) | 54 (39.4%) | 83 (60.6%) |
NIPT for Down’s syndrome is being offered on a research basis to everyone with a screening test risk higher than 1:1000 | True | 52 (35.1%) | 96 (64.9%) | 109 (79%) | 29 (21%) |
There are three possible NIPT results: positive, negative or inconclusive | True | 69 (46.6%) | 79 (53.4%) | 126 (91.3%) | 12 (8.7%) |
Women who receive a positive NIPT result will be offered an invasive test to confirm the result | True | 65 (43.9%) | 83 (56.1%) | 129 (93.5%) | 9 (6.5%) |