1979–1980 | 1985–1987 | 1991–1992 | 1997 | 2005 | OR (95% CI)* | p value | |
---|---|---|---|---|---|---|---|
500–999 g | |||||||
Live births (n) | 348 | 560 | 423 | 226 | 257 | 0.67 (0.45 to 0.99) | 0.045 |
Survivors | 25.6 (89) | 37.9 (212) | 57.0 (241) | 75.2 (170) | 66.9 (172) | ||
500–749 g | |||||||
Live births (n) | 128 | 223 | 164 | 105 | 131 | 0.48 (0.29 to 0.82) | 0.006 |
Survivors | 6.3 (8) | 9.4 (21) | 32.9 (54) | 62.9 (66) | 45.0 (59) | ||
750–999 g | |||||||
Live births (n) | 220 | 337 | 259 | 121 | 126 | 1.42 (0.66 to 3.07) | 0.37 |
Survivors | 36.8 (81) | 56.7 (191) | 72.2 (187) | 86.0 (104) | 89.7 (113) |
Data are % (n live births).
↵* For comparison of survival rates between 2005 and 1997; survival rate comparisons between previous eras reported previously.1