From: Screening and prenatal diagnosis of survival motor neuron gene deletion in pregnant women in Zhaoqing city, Guangdong Province
Age group (years)
Number of women
95% confidence interval
≤ 25
1,235 (23.75%)
23.16–24.34%
26–34
3,125 (60.10%)
59.42–60.78%
≥ 35
840 (16.15%)
15.64–16.66%
Total
5,200 (100.00%)