Prognosis

Clinical prediction rule to rank your patient's risk of a stroke

CHAD-2 stroke risk factors b	Score
Congestive hear failure	+1
Hypertension	+1
Aged 75 or older	+1
Diabetes mellitus	+1
History of stroke or transient ischaemic attack	+2

Risk of a stroke 

Score b	risk of a stroke
0 to 2	low
3 to 5	medium
6	high

Why?

5 factors can help predict the risk of stroke 

Score b	% with stroke at 1.2 years	NNF (95% CI)
0	1.7% (0.0% to 4.0%)	60 (25 to infinity)
1	3.7% (2.0% to 5.4%)	27 (19 to 51)
2	4.4% (2.6% to 6.2%)	23 (16 to 38)
3	7.4% (4.6% to 10.2%)	13 (10 to 22)
4	8.6% (4.9% to 12.3%)	12 (8 to 20)
5	9.2% (2.2% to 16.3%)	11 (6 to 46)
6	40.0% (0.0% to 82.9%)	3 (1 to infinity)