IRR of stroke in by age groups individuals aged <55 years old, stratified by stroke subtypes
| Stroke subtypes | 1994–2002 vs 1985–1993 | 2003–2011 vs 1994–2002 | 2003–2011 vs 1985–1993 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| IRR* (95% CI) | p Value | IRR* (95% CI) | p Value | IRR* (95% CI) | p Value | ||||
| Ischaemic stroke | 1.308 | (0.982 to 1.741) | 0.066 | 1.697 | (1.340 to 2.150) | <0.001 | 2.220 | (1.710 to 2.881) | <0.001 |
| ICH | 0.609 | (0.348 to 1.065) | 0.082 | 1.122 | (0.613 to 2.056) | 0.709 | 0.684 | (0.397 to 1.177) | 0.170 |
| Undetermined stroke | 0.325 | (0.034 to 3.124) | 0.330 | – | – | – | – | – | – |
ICH, intracerebral haemorrhage; IRR, Incidence rate ratio.