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- <text id=89TT3040>
- <link 90TT1314>
- <link 89TT2581>
- <title>
- Nov. 20, 1989: Alzheimer's Rise
- </title>
- <history>
- TIME--The Weekly Newsmagazine--1989
- Nov. 20, 1989 Freedom!
- </history>
- <article>
- <source>Time Magazine</source>
- <hdr>
- MEDICINE, Page 118
- Alzheimer's Rise
- The disease may be twice as common as doctors thought
- By Andrew Purvis
- </hdr><body>
- <p> Reports about the prevalence of Alzheimer's disease seem
- almost as inexorable as the illness. Each new survey appears to
- uncover a higher incidence of this wasting affliction of the
- mind. One reason is the difficulty of diagnosis. Since there is
- no perfect test for the disease -- except upon autopsy --
- doctors' estimates of who does or does not have it must rely on
- subjective assessments. As these methods improve, the number of
- people with the disease appears to increase.
- </p>
- <p> In perhaps the most authoritative survey to date,
- scientists say Alzheimer's may be up to twice as common as was
- previously thought. A study published last week in the Journal
- of the American Medical Association found that as many as one
- in ten people over 65 and, astonishingly, nearly half of those
- over 85 may have the disease. That would raise the number of
- Americans thought to be afflicted from 2.5 million to 4 million.
- "I was astounded," said Dr. Eric Larson of the University of
- Washington, who wrote an accompanying editorial. "Still, as with
- any startling finding, it needs to be confirmed."
- </p>
- <p> The study, conducted by a group from Harvard Medical
- School, examined 3,623 elderly residents in East Boston. With
- a variety of neurological and cognitive tests, including exams
- of short-term memory and attention span, the team diagnosed
- "probable" Alzheimer's for 3% of those aged 65 to 74, 19% of the
- 75- to 84-year-olds and 47% of those 85 or older. The project
- was hailed as one of the first large surveys to go out into an
- ordinary community, as opposed to examining select populations
- in clinics or nursing homes. Some previous studies that did look
- at a community based their diagnoses on existing medical
- records, which are less reliable. By doing their own testing,
- the Harvard researchers may have picked up previously
- unrecognized cases.
- </p>
- <p> Still, the latest study is hardly the last word. The
- complex testing could only confirm the probability of
- Alzheimer's, not provide a definite diagnosis. In addition, many
- of the older residents of East Boston do not speak English as
- a first language, and had less than three years of schooling;
- this, says Larson, could have brought down their test scores.
- The exams may also have failed to take into account the normal
- decline in mental acuity that comes with aging. Asks Dr. Leonard
- Kurland of the Mayo Clinic: "Where do you draw the line and say
- this is normal and this is not?" Nonetheless, one implication
- of the study is very clear -- and frightening: since people 85
- or older make up the fastest-growing segment of the population,
- Alzheimer's could have devastating consequences for the
- country's already strained health-care system.
- </p>
-
- </body></article>
- </text>
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