Birth cohort | ||||
---|---|---|---|---|
2000 | 2007 | Percentage decrease | P a | |
All infants: | ||||
Births | 766,999 | 684,862 | ||
IPD notifications | 115 | 58 | ||
IPD notifications per 100,000 | 15.0 | 8.5 | 43.3 | < .001 |
Preterm born infants: | ||||
Birthsb | 53,690 | 47,940 | ||
IPD notifications | 14 | 8 | ||
IPD notifications per 100,000 | 26.1 | 16.7 | 36.0 | .39 |