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Comparison between the no ultrasound abnormality group and the ultrasound abnormality group
| Ultrasound abnormalities group (n = 383) | No ultrasound abnormalities group (n = 64) | χ2 | P value* | |
|---|---|---|---|---|
| Abnormal karyotype detection rate n (%) | 11 (2.87) | 12 (18.75) | 25.17 | < 0.01 |
| PCNVS detection rate n (%) | 14 (3.66) | 3 (4.68) | 0.0022 | 0.963 |
| VOUS detection rate n (%) | 20(5.22) | 11 (17.19) | 10.38 | 0.00127 |
*Pearson Chi-Square significant < 0.05
