Molecular Cytogenetics

Table 8 Comparison of the incidence of 45,X and 47,XXY between the 29–33 years and the 34–38 years

From: The correlation between maternal age and fetal sex chromosome aneuploidies: a 8-year single institution experience in China

Age groups	No. of patients	45,X				47,XXY
Age groups	No. of patients	Number/incidence	PPV	χ²	P	Number/Incidence	PPV	χ²	P
29–33	5097	12 (2.35)	1:426	8.432	0.004	8 (1.57)	1:637	9.198	0.002
34–38	6780	3 (0.44)	1:2272	8.432	0.004	33 (4.87)	1:205	9.198	0.002

Data are presented as n (per 1000), unless otherwise indicated
PPV Positive predictive value

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ISSN: 1755-8166

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