Estimated births after first treatment (N) | Preterm births | Very preterm births | |||||||
---|---|---|---|---|---|---|---|---|---|
(<37 gestational weeks) | (20–31 gestational weeks) | ||||||||
Age at first treatment | Women with excisional treatment | Estimated births taking into account length distribution* | Estimated births assuming all excisions ≥10 mm were small | Excess births due to treatments | Estimated births taking into account length distribution | Estimated births assuming all excisions ≥10 mm were small | Excess births due to treatments | ||
N | % | ||||||||
<20 single excision | 167 | 1.6 | 323 | 31 | 24 | 7 | 8 | 6 | 1 |
20–24 single excision | 2355 | 22.0 | 4043 | 395 | 303 | 91 | 104 | 81 | 23 |
25–29 single excision | 3417 | 31.9 | 4332 | 428 | 325 | 103 | 111 | 87 | 24 |
30–34 single excision | 2907 | 27.1 | 1929 | 176 | 145 | 31 | 45 | 39 | 7 |
35–39 single excision | 1865 | 17.4 | 343 | 33 | 26 | 7 | 9 | 7 | 2 |
Total | 10711 | 100 % | 10970 | 1063 | 823 | 240 | 276 | 219 | 57 |