Maternal age group (y) | Live births (n) | Observed cases of Down's syndrome (n) | Reference incidence of Down's syndrome (per 104 live births) | Expected cases of Down's syndrome (n) |
---|---|---|---|---|
<20 | 0 | 0 | 6.2 | 0 |
20–24 | 23 | 1 | 6.7 | 0.015 |
25–29 | 158 | 4 | 8.8 | 0.139 |
30–34 | 127 | 1 | 13.8 | 0.175 |
35–39 | 56 | 0 | 39.3 | 0.223 |
40–44 | 10 | 0 | 138.2 | 0.138 |
⩾45 | 0 | 0 | 404.2 | 0 |
N/A3-150 | 13 | 0 | — | — |
↵3-150 Maternal age at the birth not available.