Table 2.
Subsequent PTB risk per gestational age group with 95 % CI of the point estimate.
|
PTB < 24 weeks |
PTB < 32 weeks |
PTB < 37 weeks |
||||
|---|---|---|---|---|---|---|
| GA at prior sPTB | % | 95 % CI | % | 95 % CI | % | 95 % CI |
| 16+0 −19+6 (n = 342) | 5.8 % | 3.6 %−8.9 % | 11.7 % | 8.5 %−15.6 % | 19.0 %) | 15.0 %−23.6 % |
| 20+0 −23+6 (n = 346) | 7.2 % | 4.7 %−10.5 % | 15.9 % | 12.2 %−20.2 % | 29.5 %) | 24.7 %−34.6 % |
| 24+0 −27+6 (n = 323) | 4.3 % | 2.4 %−7.2 % | 10.8 % | 7.1 %−14.1 % | 27.6 %) | 22.8 %−32.8 % |
| Total 16+0 −27+6 (n = 1011) | 5.8 % | 4.7 %−7.5 % | 12.9 % | 10.9 %−15.1 % | 25.3 %) | 22.7 %−28.1 % |