Prognosis

Many patients with stroke will get worse over the next few days ^b

Why?

A third of patients with a haemorrhage or non-cardioembolic infarction worsen

Type of stroke b	% with neurological worsening  (95% CI)
brain haemorrhage	38%  (33% to 43%)
cardioembolic infarction	15%  (13% to 18%)
non-cardioembolic infarction	34%  (32% to 36%)

• 41% of patients with acute thromboembolic ischaemic stroke will deteriorate over the first 48 hours (95% CI: 31% to 51%) . ^a
• A quarter of patients with an intracranial haemorrhage deteriorate within 24 hours of admission (23%: 95% CI: 15% to 32%). ^a

Stroke subtype can help identify patients at risk of early deterioration

Type of stroke b	% deteriorating within 7 days  (95% CI)	NNF  (95% CI)
TACI	42% (31% to 52%)	2 (2 to 3)
PACI	6.3% (0.2% to 12.4%)	16 (8 to 300)
LACI	26% (19% to 34%)	4 (3 to 5)
POCI	22% (11% to 32%)	4 (3 to 9)