On-line Appendix. Number of Events in 65- to 74-year-olds with a CHADS2 Score of 0,
Stratified by Warfarin Use.
Number of
Events
Stroke
ICH
Major Bleed
Non-major Bleed
Number of
Patients
Mean followup (Days)
Rate (95% CI
of events per
100 pt-yrs)
Non-Warfarin
6
259
291
2.9 (1.0-5.4)
Warfarin
3
207
303
1.7 (0.0-4.1)
Non-Warfarin
0
261
296
0.0 (0.0-0.9)
Warfarin
1
208
301
0.6 (0.0-1.8)
Non-Warfarin
1
244
282
0.5 (0.0-1.6)
Warfarin
9
197
271
6.2 (2.7-10.3)
Non-Warfarin
13
244
282
6.9 (3.7-10.6)
Warfarin
21
197
271
14.4 (8.9-20.5)
ICH = intracranial hemorrhage; pt-yrs = patient-years; CI = confidence interval.