Improvement in Survival Rate After Stroke

A new study reports a 40% decline in the number of deaths after stroke in the total population of Auckland (New Zealand) over the past 25 years.

Researchers at The George Institute for International Health (Sydney, Australia), in collaboration with Auckland City Hospital (Auckland, New Zealand) and the University of Auckland (Auckland, New Zealand) examined three separate studies conducted between 1981 and 2003, and investigated the rate of short and medium-term survival after stroke. The researchers found that the probability of survival increased from 1981, especially survival in the 28-day period following a stroke. The study found that a person's level of consciousness at the time of stroke, age, and a history of pre-morbid dependency, were strong predictors of survival.

The rate of hospitalization, brain imaging--computerized tomography (CT) or magnetic resonance imaging (MRI) scans--and medical attention all increased dramatically over the period. The study attributes the improved survival rate to healthcare factors associated with an increase in hospital admission and brain imaging during the most severe phase of the illness. However, as the death rate declines, there has been a significant increase in the number of patients with an impaired level of consciousness and motor deficits following stroke. The study was published in the January 2007 edition of the journal Cerebrovascular Diseases.

"In 1981, 64% of patients were admitted to hospital and 13% would have brain imaging. In 2003, 92% of patients were being admitted to hospital with 90% receiving scans,” said lead author Professor Craig Anderson, director of the neurological and mental health division at The George Institute. "This improved level of stroke care has directly benefited stroke sufferers across New Zealand.”



Related Links:
The George Institute for International Health
Auckland City Hospital
University of Auckland