Percentage of patients with stroke with prior TIA

Hackam DG, Kapral  MK, Wang JT et al.  Most stroke patients do not get a warning: a population based cohort study.  Neurology 73: 1074-1075, 2008.

cites data suggesting 17 % of CVA patients have prior TIA.  Authors review 16, 409 charts.  Timing of TIA is not addressed. 12.4  % had prior TIA, but 20% of those with large arter TIA's, much lower with hemorrhagic stroke (5%), somewhat higher with ischemic stroke (15 %).  Risk factors to have prior TIA: older, DM, HTN, AF, CHF,angina, PAD. Patients without TIA were more likely to die in  hospital, arrest, or not be discharged to home.