Trends in stroke incidence in individuals aged <55 years old, stratified by stroke subtypes
| Stroke subtypes | 1985–1993 | 1994–2002 | 2003–2011 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| n | n At risk | Incidence (95% CI) | n | n At risk | Incidence (95% CI) | n | n At risk | Incidence (95% CI) | ||||
| Ischaemic stroke | 82 | 1 006 847 | 8.1 | (6.5 to 10.1) | 110 | 1 032 843 | 10.7 | (8.8 to 12.8) | 183 | 1 012 349 | 18.1 | (15.6 to 20.9) |
| ICH | 32 | 1 006 847 | 3.2 | (2.2 to 4.5) | 20 | 1 032 843 | 1.9 | (1.2 to 3.0) | 22 | 1 012 349 | 2.2 | (1.4 to 3.3) |
| Undetermined stroke | 3 | 1 006 847 | 0.3 | (0.1 to 0.9) | 1 | 1 032 843 | 0.1 | (0.0 to 0.5) | 0 | 1 012 349 | 0.0 | (0.0 to 0.3) |
Incidence rates expressed as n/100 000/year.
IRR: Incidence rate ratio.
ICH, intracerebral haemorrhage.