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Journal of Pregnancy
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2014
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Article
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Tab 2
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Clinical Study
Influence of Second-Trimester Ultrasound Markers for Down Syndrome in Pregnant Women of Advanced Maternal Age
Table 2
Distribution of the cases of Down syndrome according to maternal age and ultrasound markers.
Maternal age (years)
With markers
Without markers
Statistical analysis (
)
Present
Absent
Present
Absent
35
4
46
2
89
36
2
19
1
91
37
2
13
1
112
38
2
9
1
101
39
1
8
1
94
≥40
8
17
6
259
Total
19
112
12
746