| |
n(%) |
n(%) |
n(%) |
| Gestational weeks |
Born alive |
Died before of postnatal life 28 d |
Died during NICU stay |
| 22 |
97 |
57(58.8) |
64(66.0) |
| 23 |
282 |
112 (39.7) |
129 (45.8) |
| 24 |
423 |
77(18.2) |
99(23.4) |
| 25 |
501 |
56(11.2) |
73(14.6) |
| 26 |
542 |
35(6.5) |
56(10.3) |
| 27 |
408 |
22(5.4) |
32(7.8) |
| =>28 |
809 |
37(3.9) |
67(8.3) |
| Unknown |
3 |
2 (66.7) |
2 (66.7) |
| Total |
3065 |
398 (13.0) |
522 (17.0) |
Hayashi K, Horiuchi T, Kusuda S. et al, Mortality rates for extremely low birth weight infants born in Japan in 2005.Pediatrics 2009 123(2): 442-450 |
