Intracerebral haemorrhages associated with anticoagulant therapy have increased more than five-fold due to more patients being prescribed warfarin, a new study concludes.
Researchers examined all cases of anticoagulant-associated intracerebral haemorrhage in the Cincinnati area and found that the rate increased from 0.8 cases per 100,000 people in 1988 to 4.4 cases per 100,000 in 1999.
Among people over 80 the rate increased from 2.5 to 45.9 per 100,000 over the same period.
The authors attribute most of the increase to a rise in the number of patients receiving warfarin to prevent ischemic stroke, the most common type.
But for most patients, the benefits of warfarin therapy continue to outweigh the raised risks of intracerebral haemorrhage, they conclude.