Prevalence and mortality risk of risk groups and the relative difference in prevalence and mortality risk of singletons for 2006 compared with 2000
| Risk groups | Prevalence | Perinatal mortality | Contribution | Prevalence | Mortality risk | ||||
| 2000 | 2006 | Difference | 2000 | 2006 | Difference | ||||
| n (%) | n (‰) | % | % | % | % | ‰ | ‰ | % | |
| Very premature 22.0–25.6 weeks | 3865 (0.31) | 3614 (935) | 29 | 0.28 | 0.36 | 27 | 931 | 912 | −2 |
| ⩾26.0 weeks and congenital anomalies | 29228 (2.34) | 1937 (66) | 16 | 2.25 | 2.78 | 24 | 84 | 46 | −45 |
| 26.0–31.6 weeks and no congenital anomalies | 8775 (0.70) | 1953 (223) | 16 | 0.72 | 0.69 | −4 | 232 | 195 | −16 |
| 32.0–36.6 weeks and no congenital anomalies | 58864 (4.72) | 1562 (27) | 13 | 5.01 | 4.61 | −8 | 27 | 19 | −30 |
| ⩾37.0 weeks no congenital anomalies | 1145708 (91.9) | 3250 (2.8) | 26 | 91.74 | 91.56 | 0 | 3.3 | 2.4 | −25 |
| Total | 1246440 (100) | 12316 (9.9) | 100 | 100.00 | 100.00 | 10.5 | 9.1 | ||