Table 4

Risk Stratification for Ischemic Stroke: SPAF III Exploratory Analysis Criterialegend

Risk StratumIntermittent AFSustained AF
nPercent of CohortObserved Stroke Rate (95% CI)nPercent of CohortObserved Stroke Rate (95% CI)
High112247.8 (4.5 to 14)459308.7 (6.8 to 11)
(Any of: age >75 and hypertension, age >75 and female, systolic BP >160 torr, prior stroke or TIA)
Moderate148323.8 (2.2 to 6.7)530342.3 (1.6 to 3.4)
(Either of: hypertension and age ≤75 yr, diabetes; and no high-risk features)
Low200430.8 (0.3 to 2.4)563361.0 (0.6 to 1.7)
(No moderate or high risk features)
  • Derived from multivariate analysis combining participants with intermittent versus sustained AF from this cohort (15).

  • legend AF = atrial fibrillation.