| Birth cohort | Average age, yr | No. of hospital admissions in 2010/11 | 2010 population, thousands | Admission rate in 2010/11, no. per 100 000 (95% CI)* | Average annual percentage change from 2004/05 to 2010/11, % (95% CI)* | Trend p value |
|---|---|---|---|---|---|---|
| 1915–19 | 89 | 8 | 100 | 8.9 (4.8 to 16.6) | −6.8 (−20.9 to 9.4) | 0.4 |
| 1920–24 | 83 | 19 | 288 | 6.7 (4.5 to 10.1) | −13.9 (−22.0 to −5.1) | 0.003 |
| 1925–29 | 79 | 58 | 481 | 12.4 (9.8 to 15.8) | −6.6 (−12.3 to −0.6) | 0.03 |
| 1930–34 | 74 | 126 | 657 | 17.1 (14.2 to 20.6) | 3.5 (−1.9 to 9.1) | 0.2 |
| 1935–39 | 69 | 103 | 796 | 14.9 (12.5 to 17.8) | 1.1 (−3.9 to 6.2) | 0.7 |
| 1940–44 | 64 | 178 | 1 030 | 16.4 (14.1 to 19.1) | 1.6 (−2.6 to 5.9) | 0.5 |
| 1945–49 | 59 | 340 | 1 403 | 24.4 (21.9 to 27.1) | 2.2 (−0.8 to 5.3) | 0.2 |
| 1950–54 | 54 | 808 | 1 666 | 48.2 (45.0 to 51.8) | 6.6 (4.4 to 8.9) | < 0.001 |
| 1955–59 | 50 | 733 | 1 948 | 36.5 (33.9 to 39.4) | 8.9 (6.5 to 11.4) | < 0.001 |
| 1960–64 | 45 | 331 | 2 142 | 15.8 (14.2 to 17.7) | 11.5 (7.7 to 15.4) | < 0.001 |
| 1965–69 | 40 | 183 | 1 933 | 9.1 (7.8 to 10.6) | 12.7 (7.4 to 18.4) | < 0.001 |
| 1970–74 | 35 | 50 | 1 817 | 2.6 (1.9 to 3.5) | 10.1 (0.7 to 20.6) | 0.04 |
| 1975–79 | 30 | 32 | 1 753 | 1.6 (1.0 to 2.4) | 33.6 (14.3 to 57.8) | < 0.001 |
| 1980–84 | 25 | 7 | 1 835 | 0.4 (0.2 to 0.9) | 25.0 (−5.1 to 69.3) | 0.1 |
| All | 55 | 2 976 | 17 848 | 16.5 (15.9 to 17.1) | 6.0 (4.1 to 7.9) | < 0.001 |
Note: CI = confidence interval. *Results are from the regression model.