Conditions associated with survival
| Cohort 1 (1984-89) | Cohort 2 (1990-94) | Total (1984-94) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Survivors (n=26) | Non-survivors (n=70) | Survivors (n=40) | Non-survivors (n=56) | Survivors (n=66) | Non-survivors (n=126) | ||||||
| Gestational age (weeks): | |||||||||||
| 23 | 0 (—) | 6 (8%) | 3 (7%) | 13 (23%) | 3 (5%) | 19 (15%) | |||||
| 24 | 7 (27%) | 25 (36%) | 17 (43%) | 26 (46%) | 24 (36%) | 51 (41%) | |||||
| 25 | 19 (73%) | 39 (56%) | 20 (50%) | 17 (31%) | 39 (59%) | 56 (44%) | |||||
| Male sex | 13 (50%) | 50 (71%) | 17 (43%) | 33 (59%) | 40 (61%) | 83* (66%) | |||||
| Birthweight | 770.3 (110.5) | 745.5 (132.5) | 741.0 (127.4) | 667.6**(119.3) | 753.1 (120.7) | 710.9* (132.1) | |||||
| CRIB score | 7.6 (3.9) (21) | 12.5*** (4.4) (55) | 7.8 (3.5) (30) | 12.9*** (3.7) (42) | 7.7 (3.7) (51) | 12.6*** (4.1) (97) | |||||
| Cranial ultrasound findings: | |||||||||||
| Significant | 9 (38%) | 35* (70%) | 9 (24%) | 21* (54%) | 18 (30%) | 56*** (63%) | |||||
| Non-significant | 15 | 15 | 28 | 18 | 43 | 33 | |||||
Results are numbers of children or mean (SD). Levels of significance * p < 0.05, ** p < 0.01, *** p < 0.001. Numbers of observations or percentages are shown in parentheses.