|  | True aneuploidy statuses | dPCR-NIPT assay performance | |||
---|---|---|---|---|---|---|
 |  +  | − | Sens (%) | Spec (%) | ||
dPCR-NIPT test results | T21a |  +  | 25 | 7 | 100.00 | 97.28 |
− | 0 | 250 | ||||
T18a |  +  | 9 | 1 | 90.0 | 99.63 | |
− | 1 | 271 | ||||
T13 |  +  | 1 | 5 | 100.00% | 98.22 | |
− | 0 | 276 | ||||
dPCR-NIPT combined Screening results* |  +  | 36 | 12 | 100.00 | 95.12 | |
− | 0 | 234 |