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UK doctors still undertreating major risk factor for stroke, study finds

Date:
October 12, 2011
Source:
BMJ Open
Summary:
Despite significant improvements in stroke prevention over the past decade, and a fall in incidence and deaths, UK doctors are still undertreating one of the major risk factors -- atrial fibrillation -- reveals new research.

Despite significant improvements in stroke prevention over the past decade, and a fall in incidence and deaths, UK doctors are still undertreating one of the major risk factors -- atrial fibrillation -- reveals research published in BMJ Open.

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Atrial fibrillation, or AF for short, describes abnormal heart rhythms. Its treatment has been prioritised in the NHS in a bid to cut preventable deaths and disability from stroke.

The researchers base their findings on an analysis of stroke data drawn from the General Practice Research Database (GPRD) for the period 1999 to 2008. The GPRD contains long term anonymised data on three million UK primary care patients.

More than 32,000 adults had a stroke, one in seven (15%) of which were fatal, during the study period.

Women were more likely to die of a stroke than men, even after taking account of age. The average age for a first stroke was 77 years for women and 71 years for men.

The figures showed significant improvements both in the number of new cases of stroke and in subsequent survival.

The prevalence of stroke rose by 12.5%, but the number of new cases fell by almost a third (30%) over the decade -- from 1.48 per 1,000 person years in 1999 to 1.04 in 2008.

Among those aged 80 and over, who are at the highest risk of stroke, the fall was even greater, at 42%.

The rate of deaths within 56 days of a first stroke almost halved, falling from one in five (21%) in 1999 to nearly one in 10 (12%) in 2008.

These improvements were paralleled by a consistent rise in prescriptions for preventive drugs, particularly those used to lower cholesterol and high blood pressure, both of which are risk factors for stroke.

But doctors undertreated patients with atrial fibrillation, the findings showed.

Around one in 10 patients had been diagnosed with AF before their first stroke, and this group were at significantly higher risk of death from stroke than those who did not have AF.

But only one in four of all those with AF were prescribed preventive anticoagulant (blood thinning) treatment, with no sign that more serious AF was being targeted.

Women were significantly more likely to have serious AF than men, but they were less likely to be given anticoagulant therapy. This was prescribed for 29% of men with AF, but only 22% of women.

Both men and women with AF were more likely to be prescribed anticoagulants after a first stroke, but while this rose from 29% to 48% of men, it only rose from 22% to 35% of women.

The authors conclude that primary care doctors are tackling the risk factors for stroke much more effectively. "However, there is a clear suggestion that risk stratification is not yet optimal, particularly in relation to patients with AF," they write.


Story Source:

The above story is based on materials provided by BMJ Open. Note: Materials may be edited for content and length.


Journal Reference:

  1. Sally Lee, Anna C E Shafe, Martin R Cowie. UK stroke incidence, mortality and cardiovascular risk management 1999–2008: time-trend analysis from the General Practice Research Database. BMJ Open, 2011; 1: e000269 DOI: 10.1136/bmjopen-2011-000269

Cite This Page:

BMJ Open. "UK doctors still undertreating major risk factor for stroke, study finds." ScienceDaily. ScienceDaily, 12 October 2011. <www.sciencedaily.com/releases/2011/10/111012185637.htm>.
BMJ Open. (2011, October 12). UK doctors still undertreating major risk factor for stroke, study finds. ScienceDaily. Retrieved November 25, 2014 from www.sciencedaily.com/releases/2011/10/111012185637.htm
BMJ Open. "UK doctors still undertreating major risk factor for stroke, study finds." ScienceDaily. www.sciencedaily.com/releases/2011/10/111012185637.htm (accessed November 25, 2014).

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