CNV | Total | McNemar’s χ 2 | P value | Sensitivity | Specificity | |||
---|---|---|---|---|---|---|---|---|
1 | 0 | |||||||
NIPT | 1 | 459 | 339 | 798 | 334.03 | < 0.001 | 1.00 (0.99, 1.00) | 0.22 (0.18, 0.26) |
0 | 1 | 96 | 97 | |||||
Total | 460 | 435 | 895 | |||||
Maternal serum screening | 1 | 188 | 1517 | 1705 | 1212.5 | < 0.001 | 0.63 (0.57, 0.68) | 0.37 (0.35, 0.39) |
0 | 111 | 884 | 995 | |||||
Total | 299 | 2401 | 2700 | |||||
fetal ultrasound | 1 | 532 | 1585 | 2117 | 991.79 | < 0.001 | 0.69 (0.66, 0.72) | 0.59 (0.57, 0.60) |
0 | 239 | 2245 | 2484 | |||||
Total | 771 | 3830 | 4601 | |||||
Advanced maternal age | 1 | 300 | 1207 | 1507 | 321.95 | < 0.001 | 0.39 (0.35, 0.42) | 0.68 (0.67, 0.70) |
0 | 471 | 2623 | 3094 | |||||
Total | 771 | 3830 | 4601 |