Age and gender specific prevalence rates in the study population
| All causes of dementia | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Population | All | Male | Female | |||||||||
| Age range | Male (n) | Female (n) | n | Rate* | 95% CI | n | Rate | 95% CI | n | Rate | 95% CI | Significance† |
| *Rate per 100 000 people at risk. | ||||||||||||
| †Significance of difference between genders by inference from 95% CI. | ||||||||||||
| ‡95% confidence interval for the prevalence rate. | ||||||||||||
| §Subjects who had a dementia starting before the age of 65 years, but were over 65 but still living on the study census day. | ||||||||||||
| 30–34 | 23898 | 23375 | 6 | 12.7 | (4.7 to 26.7)‡ | 3 | 12.6 | (2.6 to 36.7) | 3 | 12.8 | (2.7 to 37.5) | NS |
| 35–39 | 18526 | 19106 | 3 | 8.0 | (1.6 to 23.3) | 1 | 5.4 | (0.1 to 30.1) | 2 | 10.5 | (1.3 to 37.8) | NS |
| 40–44 | 18982 | 19643 | 6 | 15.5 | (5.7 to 33.8) | 1 | 5.3 | (0.1 to 29.4) | 5 | 25.5 | (8.3 to 59.4) | NS |
| 45–49 | 16549 | 16799 | 11 | 33.0 | (16.5 to 59.0) | 6 | 36.3 | (13.3 to 78.9) | 5 | 29.8 | (9.7 to 69.5) | NS |
| 50–54 | 15185 | 15237 | 19 | 62.5 | (37.6 to 97.5) | 10 | 65.9 | (31.6 to 121) | 9 | 59.1 | (27 to 112) | NS |
| 55–59 | 13983 | 13626 | 42 | 152.1 | (110 to 206) | 28 | 200.2 | (133 to 289) | 14 | 102.7 | (56.2 to 172) | NS |
| 60–64 | 12716 | 13141 | 43 | 166.3 | (120 to 224) | 26 | 204.5 | (134 to 300) | 17 | 129.4 | (75.4 to 207) | NS |
| 30–64 | 119839 | 120927 | 130 | 54.0 | (45.1 to 64.1) | 75 | 62.6 | (49.2 to 78.4) | 55 | 45.5 | (34.3 to 59.2) | NS |
| 45–64 | 58433 | 58803 | 115 | 98.1 | (81.1 to 118) | 70 | 119.8 | (93.4 to 151.0) | 45 | 76.5 | (55.8 to 102) | NS |
| Over 65§ | 55 | 33 | 22 | |||||||||